A kind of composition and preparation method who prepares extrusion forming wood-plastic foaming decoration section bar
Technical field
The present invention relates to a kind of composition and preparation method who prepares decoration bar section, relate in particular to a kind of composition and preparation method who prepares extrusion forming wood-plastic foaming decoration section bar.
Background technology
Along with reform and opening-up, people's lives are further improved, and the demand of the fast development of building decoration market, particularly decoration bar section is increasing, comprise door, frame and all kinds of lines.These decoration bar sections all adopted the high-quality natural timber to process in the past, and there are many problems in timber, and at first, timber is a kind of Nonrenewable resources, utilized timber to make decoration bar section, were subjected to resource limit; Secondly, utilize timber to do the restriction that decoration bar section is subjected to raw material length, wooden the original length may not satisfy the needs of some decoration bar section; 3. because wooden natural characteristic may exist joint, hole, hole and aberration etc. in the middle of the wood, wooden above-mentioned defective can influence the outward appearance and the quality of its goods; 4. former woodwork also exists yielding, and damaged by worms easily and corroded, and the shortcoming of water-repellancy difference, also can influence the decoration bar section of making by timber; 5. wooden product generally need painting, and are more loaded down with trivial details on technology.
In order to overcome the many shortcomings that are processed as decoration bar section with natural timber,, also there is the technology of making decoration bar section of wood plastic composite in the prior art also in order to protect the so non-renewable resource of timber.Have as now having retrieved close patent: its purposes of a kind of modified composite material of woods and plastics and manufacture method, its Chinese number of patent application are that 02104432.5 publication number is CN1445285A; A kind of wood plastic composite and its production and application, its Chinese number of patent application are that 02160123.2 publication number is CN1513918A.But above-mentioned two kinds of prior arts are mentioned very few at the composition and the preparation method of extrusion forming wood-plastic (PVC) foaming decoration section bar.
Summary of the invention
Technical problem to be solved by this invention provides a kind of composition and method for preparing extrusion forming wood-plastic foaming decoration section bar, the feedstock composition of preparation extrusion forming wood-plastic foaming decoration section bar is proposed, adopt this kind composition to produce decoration bar section, and this preparing raw material technology is provided with the method for extrusion moulding.
For solving the problems of the technologies described above, a kind of composition for preparing extrusion forming wood-plastic foaming decoration section bar of the present invention, comprise 100 parts plastics, 50% wood powder, additive, described additive comprise 6% one package stabilizer, 0.6% external lubricant, 1.2% internal lubricant, 6% anti-impact modifier, 2% processing aid, 2% tackifier, 5% foaming control agent, 0.8% whipping agent, 6% light calcium carbonate CaCo
3, 0.5% blowing promotor, 1% ageing-resistant dose, 0.1%-1% pigment powder.
A kind of extrusion forming wood-plastic foaming decoration section bar composition of optimal technical scheme of the present invention, external lubricant wherein are that polyethylene wax, internal lubricant are that stearic acid, anti-impact modifier are that CPE, processing aid are that ACR, tackifier are that dioctyl phthalate (DOP), blowing promotor are that Zinic stearas, ageing-resistant dose are titanium dioxide.
A kind of extrusion forming wood-plastic foaming decoration section bar preparation of compositions of the present invention method may further comprise the steps: the first step, wood powder are selected to handle with modification; In second step, wood powder and plastics are mixed, it is characterized in that, wherein the first step wood powder is selected to may further comprise the steps with the modification processing: a, pour 25 parts of dried wood powders in the high-speed mixer into; B, with 6 parts of light calcium carbonates, 1 part of titanium dioxide, 0.8 part of stearic acid, an amount of pigment powder and 1 part of dioctyl phthalate (DOP) are poured in the high-speed mixer; C, 25 parts of dry wood powders are poured in the high-speed mixer; D, high-speed mixer carry out high-speed mixing to 120 ℃; E, it is standby to pour the miscellany that obtains in the steps d into the low speed cold mixer; And wherein the second step wood powder and plastics mix and may further comprise the steps: 1,50 parts of PVC are poured in the high-speed mixer; 2, with 6 parts of CPE, 2 parts of ACR, 1 part of DOP, 6 parts of one package stabilizers, 0.6 part of polyethylene wax, 0.6 part of stearic acid, 5 parts of foaming control agents, 0.8 part of whipping agent, 0.5 part of Zinic stearas are poured in the high-speed mixer; 3, get 50 parts of PVC again and pour high-speed mixer into, carry out high-speed mixing to 120 ℃; 4, the mixture that obtains in the step 3 is poured in the low speed mixer of standby modified wood powder among the step e and mixes, be cooled to below 50 ℃.
The present invention utilizes wood powder and plastics can be used for making decoration bar section as the composition of making extrusion forming wood-plastic foaming decoration section bar.Utilizing the present invention to make decoration bar section can be unrestricted on length, does not have the aberration problem.And have good antiseptic property, can save a large amount of timber again.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the detailed composition form of wood-plastic foaming decoration section bar of the present invention.
Embodiment
In a kind of preparation extrusion forming wood-plastic foaming decoration section bar of the present invention composition, comprise plastics, wood powder and additive.Additive wherein comprises one package stabilizer, external lubricant, internal lubricant, is anti-impact modifier, processing aid, tackifier, foaming control agent, whipping agent, light calcium carbonate CaCO
3, blowing promotor, ageing-resistant dose, pigment powder.External lubricant wherein is that polyethylene wax, internal lubricant are that stearic acid, anti-impact modifier are that CPE, processing aid are that ACR, tackifier are that dioctyl phthalate (DOP), blowing promotor are that Zinic stearas, ageing-resistant dose are titanium dioxide.
Fig. 1 prepares the detailed composition form of wood-plastic foaming decoration section bar for the present invention, as shown in Figure 1, wherein wood powder is 100~150 orders, the wood powder proportion is 50%, the one package stabilizer proportion is 6%, the external lubricant proportion is 0.6%, the internal lubricant proportion is 1.2%, the anti-impact modifier proportion is 6%, the processing aid proportion is 2%, and the tackifier proportion is 2%, and the foaming control agent proportion is 5%, bag infusion proportion is 0.8%, the light calcium carbonate proportion is 6%, and the Zinic stearas proportion is 0.5%, and the titanium dioxide proportion is 1%, PVC-7 type resin is 100 parts, and pigment powder proportion is for being 0.1%-1%.
In making processes, at first select for use selected at 100~150% wood powder, before modification is handled again, the content of wood powder moisture content is less than 3%, earlier 25 parts of dry backs poured in the high-speed mixer wood powder, again with 6 parts light calcium carbonate, 1 part titanium dioxide, 0.8 part stearic acid, and the pigment powder and 1 part dioctyl phthalate (DOP) pour in the high-speed mixer, last 25 parts dry wood powder is poured high-speed mixer into.High-speed mixing to 120 ℃, mixing time is about 10 minutes.It is standby to pour said mixture into the low speed cold mixer.When wood being moulded mixing, 50 parts PVC (polyvinyl chloride) are poured in the high-speed mixer, again with 6 parts CPE, 2 parts ACR, 1 part dioctyl phthalate (DOP), 6 parts one package stabilizer, 0.6 part polyethylene wax, 0.6 part stearic acid, 5 parts foaming control agent, 0.8 the whipping agent of part, 0.5 part Zinic stearas are poured into, then the PVC that gets 50 parts again pours high-speed mixer into, high-speed mixing to 120 ℃, the time is about 8~10 minutes.Be poured into again in the low speed mixer of standby modified wood powder and mix.Be cooled to 50 ℃ with bottom discharge.