Summary of the invention
The technical problem solving: the tensile property of the polyvinyl chloride film material of common use is poor, its tensile strength only has 40MPa to 50MPa, its elongation at break also only has 170% to 200%, in some uses that elastic deformation is had relatively high expectations to thin-film material, its poor performance can not be well used.
Technical scheme: for the problems referred to above, the invention discloses a kind of polyvinyl chloride composite film material, polyvinyl chloride composite film material is made up of according to weight ratio following composition:
34~48 parts of polyvinyl chloride,
16~22 parts of polyvinyl alcohol,
13~17 parts of diethylene glycol dibenzoates,
6~12 parts of butyl formates,
3~7 parts of planoforms,
5~8 parts of glycerol,
2~4 parts, magnesiumcarbonate.
The preparation method of described polyvinyl chloride composite film material comprises the steps:
(1) polyvinyl chloride is that 34~48 parts, polyvinyl alcohol are that 16~22 parts, diethylene glycol dibenzoate are 13~17 parts, will vinylchlorid, polyvinyl alcohol, three kinds of compositions of diethylene glycol dibenzoate drop in high-speed mixers and mix;
(2) be that 6~12 parts, planoform are that 3~7 parts, glycerol are that 5~8 parts, magnesiumcarbonate are 2~4 parts to dropping into butyl formate in high-speed mixer again, butyl formate, planoform, glycerol, magnesiumcarbonate are mixed with mixed compound in step (1) again, after mixing, obtain final compound;
(3) open twin-screw extruder, the final compound twin-screw extruder obtaining in step (2) is plastified to extruding, twin-screw extruder length-to-diameter ratio is 20:1~30:1, when twin screw pushes, extrusion temperature is segmented into: first paragraph is 150~165 DEG C, second segment is 170~175 DEG C, and the 3rd section is 190~200 DEG C;
(4) after twin screw extruding, compound is carried out to compressing tablet and stretch processing, then preparation becoming thin-film material, is described polyvinyl chloride composite film material.
The preparation method of described a kind of polyvinyl chloride composite film material, in described preparation method, butyl formate is preferably 9~12 parts.
The preparation method of described a kind of polyvinyl chloride composite film material, the planoform described in preparation method is preferably 7 parts.
The preparation method of described a kind of polyvinyl chloride composite film material, the diethylene glycol dibenzoate described in preparation method is preferably 15 parts.
By add magnesiumcarbonate, planoform in polyvinyl chloride film material, improve elongation at break and the tensile strength of polyvinyl chloride film material.
Beneficial effect: the polyvinyl chloride composite film material that preparation method of the present invention prepares has overcome the conventional problem that polyvinyl chloride film tensile strength is low, elongation at break is low, the tensile strength of the polyvinyl chloride composite film material of preparation is 64.6MPa to 67.2MPa, and elongation at break has reached 213% to 225%.
Embodiment
Embodiment 1
(1) polyvinyl chloride is that 34kg, polyvinyl alcohol are that 22kg, diethylene glycol dibenzoate are 15kg, and vinylchlorid, polyvinyl alcohol, three kinds of compositions of diethylene glycol dibenzoate are dropped in high-speed mixer and mixed;
(2) be that 6kg, planoform are that 7kg, glycerol are that 8kg, magnesiumcarbonate are 4kg to dropping into butyl formate in high-speed mixer again, butyl formate, planoform, glycerol, magnesiumcarbonate are mixed with mixed compound in step (1) again, after mixing, obtain final compound;
(3) open twin-screw extruder, the final compound twin-screw extruder obtaining in step (2) is plastified to extruding, and twin-screw extruder length-to-diameter ratio is 30:1, and when twin screw pushes, extrusion temperature is segmented into: first paragraph is 165 DEG C, second segment is 170 DEG C, and the 3rd section is 200 DEG C;
(4) after twin screw extruding, compound is carried out to compressing tablet and stretch processing, then preparation becoming thin-film material, is described polyvinyl chloride composite film material.
The tensile strength of the polyvinyl chloride film material of the embodiment 1 preparing is 64.6MPa, and elongation at break is 213%.
Embodiment 2
(1) polyvinyl chloride is that 42kg, polyvinyl alcohol are that 16kg, diethylene glycol dibenzoate are 13kg, and vinylchlorid, polyvinyl alcohol, three kinds of compositions of diethylene glycol dibenzoate are dropped in high-speed mixer and mixed;
(2) be that 9kg, planoform are that 3kg, glycerol are that 6kg, magnesiumcarbonate are 2kg to dropping into butyl formate in high-speed mixer again, butyl formate, planoform, glycerol, magnesiumcarbonate are mixed with mixed compound in step (1) again, after mixing, obtain final compound;
(3) open twin-screw extruder, the final compound twin-screw extruder obtaining in step (2) is plastified to extruding, and twin-screw extruder length-to-diameter ratio is 20:1, and when twin screw pushes, extrusion temperature is segmented into: first paragraph is 150 DEG C, second segment is 175 DEG C, and the 3rd section is 190 DEG C;
(4) after twin screw extruding, compound is carried out to compressing tablet and stretch processing, then preparation becoming thin-film material, is described polyvinyl chloride composite film material.
The tensile strength of the polyvinyl chloride film material of the embodiment 2 preparing is 67.2MPa, and elongation at break is 225%.
Embodiment 3
(1) polyvinyl chloride is that 48kg, polyvinyl alcohol are that 19kg, diethylene glycol dibenzoate are 17kg, and vinylchlorid, polyvinyl alcohol, three kinds of compositions of diethylene glycol dibenzoate are dropped in high-speed mixer and mixed;
(2) be that 12kg, planoform are that 5kg, glycerol are that 5kg, magnesiumcarbonate are 3kg to dropping into butyl formate in high-speed mixer again, butyl formate, planoform, glycerol, magnesiumcarbonate are mixed with mixed compound in step (1) again, after mixing, obtain final compound;
(3) open twin-screw extruder, the final compound twin-screw extruder obtaining in step (2) is plastified to extruding, and twin-screw extruder length-to-diameter ratio is 20:1, and when twin screw pushes, extrusion temperature is segmented into: first paragraph is 160 DEG C, second segment is 170 DEG C, and the 3rd section is 200 DEG C;
(4) after twin screw extruding, compound is carried out to compressing tablet and stretch processing, then preparation becoming thin-film material, is described polyvinyl chloride composite film material.
The tensile strength of the polyvinyl chloride film material of the embodiment 3 preparing is 66.5MPa, and elongation at break is 219%.
Embodiment 4
(1) polyvinyl chloride is that 48kg, polyvinyl alcohol are that 19kg, diethylene glycol dibenzoate are 17kg, and vinylchlorid, polyvinyl alcohol, three kinds of compositions of diethylene glycol dibenzoate are dropped in high-speed mixer and mixed;
(2) be that 12kg, glycerol are 5kg to dropping into butyl formate in high-speed mixer again, butyl formate, glycerol are mixed with mixed compound in step (1) again, after mixing, obtain final compound;
(3) open twin-screw extruder, the final compound twin-screw extruder obtaining in step (2) is plastified to extruding, and twin-screw extruder length-to-diameter ratio is 20:1, and when twin screw pushes, extrusion temperature is segmented into: first paragraph is 160 DEG C, second segment is 170 DEG C, and the 3rd section is 200 DEG C;
(4) after twin screw extruding, compound is carried out to compressing tablet and stretch processing, then preparation becoming thin-film material, is described polyvinyl chloride composite film material.
The tensile strength of the polyvinyl chloride film material of the embodiment 4 preparing is 51.3MPa, and elongation at break is 174%.
The performance comparison of the polyvinyl chloride film material preparing from embodiment 1 to 4 is found out, preparation method of the present invention is by having added magnesiumcarbonate, planoform, improve significantly tensile strength and the elongation at break of the polyvinyl chloride film material preparing, effectively raised the character of polyvinyl chloride film material.