CN102618050A - Preparation method of modified mould composite material - Google Patents

Abstract

The invention relates to a preparation method of a modified mould composite material. Raw material compositions are premixed by weight portion through a high speed mixer or a kneader, which is generally used in plastic processing; during the premixing, heating is performed appropriately according to the condition of the materials, and the mixing temperature is generally lower than 100 DEG C; and the premixed materials is subjected to melt blending through universal rubber plastic blending equipment, and then is subjected to the procedures of extrusion, pelletization and the like, so as to obtain the wood-plastic composite material. The invention provides the preparation method of the modified composite material with the advantages of electrostatic prevention, environmental friendliness, acoustic insulation, heat insulation, good air tightness, high strength and good tolerance.

Description

A kind of preparation method of modified composite material

Technical field

The present invention relates to a kind of modified composite material preparation method, relate to or rather that a kind of anti-electrostatic, environmental protection, sound insulation, heat insulation, good airproof performance, intensity are high, the preparation method of the modified composite material of better tolerance.

Background technology

A large amount of denudations is unfavorable for the human society harmonious development, in order to make full use of resource as the effective means of protecting environment, cutting down the consumption of energy, to mould Dai Mu, to show one's talent with the thinking of moulding Dai Gang.Yet today of 21 century, the application of wood-plastic products is still very little, seldom sees in the real life.Even in some developed country, this material is being made aspects such as wood-plastic door window, railroad ties, building template, car door shield, car inner piece and decorations, also just is in beginning and starting stage.The application of wood-plastic products, the scientific research technology of awaiting further deeply and perfect, but in 21st century, will be developed rapidly, this has become the common recognition of department such as environmental protection, building, government and scientific circles.

The patent No. is the Japanese Patent of JP 57187392, provides a kind of by cross-linked polyolefin chip and wood chip and tamanori blend and the wood fibre filled plastics fuel that obtains.Its objective is in order to make polyolefine reclaimed materials and waste wood can be used as fuel feedback.Employed tamanori can be selected from cumarone resin, terpine resin and lower molecular weight butyl rubber etc., and this invention can be made into the effigurate fuel that transports and use be convenient to.This kind plastic fuel need not that the processibility of the composition machine performance of material and extrusion moulding is had requirement.

It is a kind of by wood powder enhanced compound plastic plate that publication number is that the one Chinese patent application of CN 1255427A provides.Be that Vestolen PP 7052, a small amount of Vilaterm and wood powder, paper scrap and hotmelt melt blending are extruded or rolled and get.So-called hotmelt is the grafts of Vestolen PP 7052 and polar monomer (like MALEIC ANHYDRIDE etc.).The recovery plastics are not used in this patented claim, and in plastics, adding wood powder is in order to improve the intensity of plastic plate.Wherein the acquisition of hotmelt also needs graft process in advance, and preparation method and operating procedure are complicated, and cost is high.Publication number is that the one Chinese patent application of CN 1257890A also provides similar a kind of matrix material by wood powder reinforced polypropylene.Also use polyacrylic grafts as wood powder and polyacrylic coupling agent.Add conventional processing aid in addition, be selected from polyethylene wax, chlorinatedpolyethylene, oxidic polyethylene, its chlorinated polypropylene, the clorafin one or more, to improve the flowability of wood powder.

Publication number is the blend that the one Chinese patent application of CN 1204656A provides a kind of wood fibre and waste or used plastics.Oligomer polymer overmold wood powder is used in this invention, improves the avidity of wood powder and waste or used plastics.The oligomer polymkeric substance is selected from ethene paraffin or Atactic Polypropelene or chlorinatedpolyethylene.This patent does not provide the composition machine performance of relevant matrix material and the data of processing characteristics.

Recent years, the research of wooden mold tool composite technology has become the focus of domestic and international research of the same trade.Yet existing wood-plastic products performance is on the low side, unstable product quality.The starting material that meet the environmental protection source are fewer and feweri, expect always on the industry that mechanical property is good, and material source is cheap, and outward appearance and processing characteristics more approach the appearance of the wood-plastic products of timber.

Summary of the invention

The object of the present invention is to provide a kind of HS, corrosion-resistant, good weatherability, outward appearance and processing characteristics more approach the preparation method of the wooden mold tool matrix material of timber.

1. the preparation method of a modified composite material, it is characterized in that: this feedstock composition is by weight ratio: said composition is: bamboo fibers 55%-70%, wood powder: 15%-55%, new LDPE (film grade) 22%, thermoplastics 1.5-2.5%, 700 order superfine talcum powders 3%, vinylbenzene and methyl acrylate mix monomer: 1%, be selected from any plastics among PVC, PP, the PE: dibasic lead phosphite 2.5%: dibasic lead stearate 0.2%: lead stearate 0.1%: soft ester acid calcium 0.1%; 1.0%, lime carbonate: macromolecule wax 1%: 0.1%, melamine resin 3%, polyethylene wax 2.5%, glass fiber powder 5%, 12 types of polyamide elastomers 3% of nylon; Said thermoplastics is: Vilaterm, Vestolen PP 7052, polybutylenes, SE, PS, third rare, nitrile-butadiene-styrene terpolymer one or more;

With said bamboo fibers powder be treated to 90 orders, wood powder is treated to 100 orders;

(1) the plastic pellet modification is handled: the component in the claim 1 except that being placed on, 12 types of polyamide elastomers of nylon is stirred 3min in the machinery, and extruding pelletization, 185 ℃ of extruder barrel temperature, 200 ℃ of die head temperatures obtain the modified plastics particle;

(2) mix to stir: modified plastics particle and 12 types of polyamide elastomers of nylon are stirred 18min get final product in high-speed mixer;

Mixing granulation: step (2) modified plastics particle and step (3) mixture are sent into forcing machine carry out fusion, blend, and granulation, 185 ℃ of extruder barrel temperature, 195 ℃ of die head temperatures obtain the anti-quiet matrix material particle of mildew-resistant.

The present invention has very high intensity and bending resistance and shock resistance, antistatic performance through the matrix material of modification; The outward appearance of material of the present invention is similar to timber in addition, and can use plane, saw, and the mode of converted timbers such as cutter is processed; Thereby make this matrix material have heat insulation, sound insulation, good weatherability; Do not corrode, advantages such as environmental stress resistance have fundamentally solved the low shortcoming of product mechanical strength of wooden molding technology before; Wherein resistance to impact shock significantly improve the fragility problem that efficiently solves the article that produce originally, make wood mould compounding technology and be converted into actual high-performance commodity.And this wood plastic composite production energy consumption is low, all recyclings of waste material that production process produces, and non-environmental-pollution is typical Green Product.

Embodiment

Through embodiment the present invention is described further below, but protection scheme of the present invention is not limited to following examples.

(1) a kind of preparation method of modified composite material is characterized in that: this feedstock composition is by weight ratio: said composition is: bamboo fibers 55%-70%, wood powder: 15%-55%, new LDPE (film grade) 22%, thermoplastics 1.5-2.5%, 700 order superfine talcum powders 3%, vinylbenzene and methyl acrylate mix monomer: 1%, be selected from any plastics among PVC, PP, the PE: dibasic lead phosphite 2.5%: dibasic lead stearate 0.2%: lead stearate 0.1%: soft ester acid calcium 0.1%; 1.0%, lime carbonate: macromolecule wax 1%: 0.1%, melamine resin 3%, polyethylene wax 2.5%, glass fiber powder 5%, 12 types of polyamide elastomers 3% of nylon; Said thermoplastics is: Vilaterm, Vestolen PP 7052, polybutylenes, SE, PS, third rare, nitrile-butadiene-styrene terpolymer one or more;

With said bamboo fibers powder be treated to 90 orders, wood powder is treated to 100 orders;

(3) the plastic pellet modification is handled: the component in the claim 1 except that being placed on, 12 types of polyamide elastomers of nylon is stirred 3min in the machinery, and extruding pelletization, 185 ℃ of extruder barrel temperature, 200 ℃ of die head temperatures obtain the modified plastics particle;

(4) mix to stir: modified plastics particle and 12 types of polyamide elastomers of nylon are stirred 18min get final product in high-speed mixer;

Mixing granulation: step (2) modified plastics particle and step (3) mixture are sent into forcing machine carry out fusion, blend, and granulation, 185 ℃ of extruder barrel temperature, 195 ℃ of die head temperatures obtain the anti-quiet matrix material particle of mildew-resistant.

（2）

A kind of preparation method like wooden model tool matrix material, it is characterized in that: this feedstock composition is by weight ratio: bamboo fibers 55%-70%, wood powder: 15 %-55%, new LDPE (film grade) 12%, solubilizing agent 2%, lubricant 2.5%, thermoplastics 1.5-2..5%, 700 order superfine talcum powders 3%, vinylbenzene and methyl acrylate mix monomer: 1%, be selected from any plastics among PVC, PP, the PE: dibasic lead phosphite 2.5%: dibasic lead stearate 0.2%: lead stearate 0.1%: soft ester acid calcium 0.1%; 1.0%, lime carbonate: macromolecule wax 1%: 0.1%, the melamine resin 3%; To be crushed to less than behind the 30mm with bamboo fibers, wood powder; Wear into fineness 30 orders～300 purpose wood powders through pulverizing mill again; Through blowing hot-air and 110 ℃～150 ℃ oven dry; Make moisture≤2%, said components is carried out premix earlier by proportioning, the equipment of use is high-speed mixer or kneader used in the common plastic working; Can look the material situation during premix and suitably heat, this mixing temperature generally should be lower than 100 ℃; Use general rubber plastic blend equipment to carry out melt blending the material behind the premix, obtain wood plastic composite of the present invention through step such as extruding pelletization again.

One or more of described thermoplastics: Vilaterm, Vestolen PP 7052, polybutylenes, SE, PS, third rare, the nitrile-butadiene-styrene terpolymer.

The blending temperature of said material is selected not only guaranteeing the complete fusion of matrix thermoplastics but also can not make in the scope of its decomposition, generally between 150～200 ℃; Described blending equipment is the general blending equipment in the rubber and plastic processing industry, is twin screw extruder, single screw extrusion machine, mill and Banbury mixer etc.

The present invention has very high intensity and bending resistance and shock resistance through the matrix material of modification; The outward appearance of material of the present invention is similar to timber in addition, and can use plane, saw, and the mode of converted timbers such as cutter is processed; Thereby make this matrix material have heat insulation, sound insulation, good weatherability; Do not corrode, advantages such as environmental stress resistance have fundamentally solved the low shortcoming of product mechanical strength of wooden molding technology before; Wherein resistance to impact shock significantly improve the fragility problem that efficiently solves the article that produce originally, make wood mould compounding technology and be converted into actual high-performance commodity.And this wood plastic composite production energy consumption is low, all recyclings of waste material that production process produces, and non-environmental-pollution is typical Green Product.

Claims (1)

1. the preparation method of a modified composite material, it is characterized in that: this feedstock composition is by weight ratio: said composition is: bamboo fibers 55%-70%, wood powder: 15%-55%, new LDPE (film grade) 22%, thermoplastics 1.5-2.5%, 700 order superfine talcum powders 3%, vinylbenzene and methyl acrylate mix monomer: 1%, be selected from any plastics among PVC, PP, the PE: dibasic lead phosphite 2.5%: dibasic lead stearate 0.2%: lead stearate 0.1%: soft ester acid calcium 0.1%; 1.0%, lime carbonate: macromolecule wax 1%: 0.1%, melamine resin 3%, polyethylene wax 2.5%, glass fiber powder 5%, 12 types of polyamide elastomers 3% of nylon; Said thermoplastics is: Vilaterm, Vestolen PP 7052, polybutylenes, SE, PS, third rare, nitrile-butadiene-styrene terpolymer one or more;

With said bamboo fibers powder be treated to 90 orders, wood powder is treated to 100 orders;

(1) the plastic pellet modification is handled: the component in the claim 1 except that being placed on, 12 types of polyamide elastomers of nylon is stirred 3min in the machinery, and extruding pelletization, 185 ℃ of extruder barrel temperature, 200 ℃ of die head temperatures obtain the modified plastics particle;

(2) mix to stir: modified plastics particle and 12 types of polyamide elastomers of nylon are stirred 18min get final product in high-speed mixer;

Mixing granulation: step (2) modified plastics particle and step (3) mixture are sent into forcing machine carry out fusion, blend, and granulation, 185 ℃ of extruder barrel temperature, 195 ℃ of die head temperatures obtain the anti-quiet matrix material particle of mildew-resistant.