Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, a kind of preparation method of high tenacity pvc material is provided, in the preparation process in accordance with the present invention, the process eliminating high-temperature mixing and cool rapidly, therefore saves the large energy required for heating and cooling, thus reduce cost, in addition, in production process, the operation before extruding is simplified, this improves production efficiency.
The technical solution used in the present invention is as follows: a kind of preparation method of high tenacity pvc material, and it comprises the following steps:
Step 1, by chlorinatedpolyethylene, nanometer silica gel, light calcium carbonate, calcium stearate, MBS resin, silicon nitride nano particles, boron fibre, mould inhibitor, thermo-stabilizer, secondary plasticizer mixing and stirring in mixer according to a certain percentage, stirring velocity is 800rad/min; Churning time is 20-25min;
Step 2, in the mixer after above-mentioned stirring, slowly add a certain amount of polyvinyl chloride resin powder, do not stop to stir, stirring velocity is 800rad/min, and churning time is 2-3h;
After step 3, step 2 complete, add a certain amount of Phthalic acid, diallyl ester, and stir stirred vessel in mixer, stirring velocity is 800rad/min, and churning time is 20-30min, obtains mixed emulsion;
Step 4, with vacuum unit, vacuum defoaming treatment is carried out to described mixed emulsion;
Step 5, process is left standstill to the mixed emulsion after above-mentioned defoaming treatment, and 60 DEG C are preheated to it;
After step 6, preheating complete, mixed emulsion is dropped in Banbury mixer and carry out banburying;
After step 7, banburying terminate, sheet work in-process are made in calendering, are then cut according to designed size by work in-process, namely obtain high tenacity pvc material.
Further, in step 1, described mould inhibitor is nano titanium oxide, and described nano titanium oxide is rutile-type, and described thermo-stabilizer is barium zinc stabilizer, and described secondary plasticizer is synthesis vegetable esters.
Further, in described step 4, temperature during vacuum froth breaking is 120 DEG C.
Further, the high tenacity pvc material obtained by above-mentioned preparation method is made up of the raw material of following parts by weight: chlorinatedpolyethylene 5 parts, nanometer silica gel 6 parts, polyvinyl chloride (PVC) RESINS 86 parts, light calcium carbonate 12 parts, calcium stearate 10 parts, Phthalic acid, diallyl ester 5 parts, MBS resin 3 parts, silicon nitride nano particles 3 parts, boron fibre 6 parts, mould inhibitor 2 parts, thermo-stabilizer 3 parts, 7 parts, softening agent.
In the preparation process in accordance with the present invention, the process eliminating high-temperature mixing and cool rapidly, therefore saves the large energy required for heating and cooling, thus reduce cost, in addition, in production process, operation before extruding is simplified, and this improves production efficiency.
In order to obtain high tenacity pvc material, in preparation process, silicon nitride nanopowder is added in batch mixing, greatly can strengthen wear resistance and the intensity on floor, and calcium stearate can play heat stabilization, is processed with large effect to pvc material, to colour stable, processing extruded velocity, the demoulding is all helpful, can significantly improve pvc material Forming Quality; Boron fibre has high strength, snappiness and resistant to elevated temperatures characteristic, and adding boron fibre in pvc material can significantly increase its intensity, is the powerful toughener of a kind of performance, pvc material is not easily destroyed; Chlorinatedpolyethylene has excellent weathering resistance, resistance to ozone, chemical-resistant resistance and ageing-resistant performance, there is good oil-proofness, flame retardant resistance and tinctorial property, with other macromolecular material, there is good consistency, chlorinatedpolyethylene is added in pvc material, the properties of pvc material can be improved, make pvc material toughness good, its snappiness effect can have been given play to better.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: by adding the proportional quantity of specific components and each component of change, make pvc material meet there is good mechanical property while, make pvc material possess high tenacity, improve its survivability, and then reach long-lived object, simultaneously optimal preparation technology, makes the pvc material performance that obtains better.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
In order to make the object of invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
A preparation method for high tenacity pvc material, it comprises the following steps:
Step 1, by chlorinatedpolyethylene, nanometer silica gel, light calcium carbonate, calcium stearate, MBS resin, silicon nitride nano particles, boron fibre, mould inhibitor, thermo-stabilizer, secondary plasticizer mixing and stirring in mixer according to a certain percentage, stirring velocity is 800rad/min; Churning time is 20-25min;
Step 2, in the mixer after above-mentioned stirring, slowly add a certain amount of polyvinyl chloride resin powder, do not stop to stir, stirring velocity is 800rad/min, and churning time is 2-3h;
After step 3, step 2 complete, add a certain amount of Phthalic acid, diallyl ester, and stir stirred vessel in mixer, stirring velocity is 800rad/min, and churning time is 20-30min, obtains mixed emulsion;
Step 4, with vacuum unit, vacuum defoaming treatment is carried out to described mixed emulsion;
Step 5, process is left standstill to the mixed emulsion after above-mentioned defoaming treatment, and 60 DEG C are preheated to it;
After step 6, preheating complete, mixed emulsion is dropped in Banbury mixer and carry out banburying;
After step 7, banburying terminate, sheet work in-process are made in calendering, are then cut according to designed size by work in-process, namely obtain high tenacity pvc material.
In the present embodiment, in step 1, described mould inhibitor is nano titanium oxide, described nano titanium oxide is rutile-type, and described thermo-stabilizer is barium zinc stabilizer, and described secondary plasticizer is synthesis vegetable esters, in described step 4, temperature during vacuum froth breaking is 120 DEG C.
In the present embodiment, the high tenacity pvc material obtained by above-mentioned preparation method is made up of the raw material of following parts by weight: chlorinatedpolyethylene 5 parts, nanometer silica gel 6 parts, polyvinyl chloride (PVC) RESINS 86 parts, light calcium carbonate 12 parts, calcium stearate 10 parts, Phthalic acid, diallyl ester 5 parts, MBS resin 3 parts, silicon nitride nano particles 3 parts, boron fibre 6 parts, mould inhibitor 2 parts, thermo-stabilizer 3 parts, 7 parts, softening agent.The high tenacity pvc material obtained is tested, its shore hardness is 78, fire-protection rating compound UL94V-0 levels necessitate, temperature to be 90 DEG C of humidity be place 24 hours in the environment of 33% after the test result that obtains be, sample does not find the sign be out of shape, and color and luster is normal, and its tensile strength is 82MPa, object for appreciation goes intensity to be 98.7GPa, and notched Izod impact strength is 3.8KJ/m
-2.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.