CN1133535C - Improved polypropylene pearlescent synthetic paper making method - Google Patents
Improved polypropylene pearlescent synthetic paper making method Download PDFInfo
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- CN1133535C CN1133535C CNB991111591A CN99111159A CN1133535C CN 1133535 C CN1133535 C CN 1133535C CN B991111591 A CNB991111591 A CN B991111591A CN 99111159 A CN99111159 A CN 99111159A CN 1133535 C CN1133535 C CN 1133535C
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Abstract
The present invention relates to an improved method for producing polypropylene pearlescent synthetic paper, which is improved technology for producing polypropylene pearlescent synthetic paper with the thickness of 25 to 250 micrometers and with dual spindle extension by a three-layer coextrusion method. Polypropylene resin and an inorganic composition respectively concentrate with extrusions of a single screw rod main extruding machine and two single screw rod auxiliary extruding machines, wherein the single screw rod main extruding machine has a suction device, and the single screw rod auxiliary extruding machines have suction devices; the polypropylene resin, the inorganic composition, and the extrusions pass through the same lower impression mould head to become a three-layer board sheet. An array combination mode of the pearlescent synthetic paper with ultra bright double faces and three-layer coextrusion, etc., is formed by coiling after cold formation, single spindle extension and electric corona treatment, wherein the thickness of the pearlescent synthetic paper is from 25 to 250 micrometers. Moreover, the pearlescent synthetic paper can also be used as coating body paper for coating-stage synthetic paper.
Description
The invention provides a kind of improved preparation that makes thickness 25-250 μ biaxial stretched polypropylene pearly synthetic paper with single-screw extrusion machine.
The present biaxial stretched polypropylene pearly synthetic paper that makes in three-layer co-extruded pressure mode, it is different from polyacrylic double shaft extensioning film is substrate layer (intermediate layer), and go up in its back of the body surface unidirectional extension film of polypropylene of the inorganic fine powder that contains 8-65 weight % of fitting as the synthetic paper of paper floor (as the application of Japanese prince's oiling synthetic paper house journal: Japanese Patent Publication 46-40794 number, Japanese Patent Publication 56-141339 number, Japanese kokai publication sho 56-118437 number, Japanese kokai publication hei 3-87255 number) patent such as our company got permission by No. 72218 patents of Taiwan invention.The prepared three-layer co-extruded pressure biaxial stretched polypropylene pearly synthetic paper of this patent method for making, its high paper intensity can prevent the puzzlement that comes off of the paper powder in printing processing, and the paper dimensional stability characteristics good, with low cost of being heated, and can make product do the popularity sale.
But, product purpose replaces the natural pulp paper aspect of manufacturing paper with pulp for more being extended to synthetic paper material characteristic, as paper packaging material, the ox-hide paper wood, industrialization such as release liners packing purposes, so still will be to the product performance of pearlescent synthetic paper, as covering property, hear resistance, improve on the gross thickness and on the cost, make the dealer under purchasing material cost do not increase, use light weight, waterproof, tearproof pearlescent synthetic paper material, avoid using the not water-fast and intensity of traditional paper because of it, following inadequately employed conventional paper of characteristic and plastic cement applying material are (as flower pot coat, the former pocket of brown paper, brown paper drenches film PE makes release base stock) after use, can't reclaim usefulness again, and increase the burden in social cost and the environmental protection.
For addressing the above problem, the invention provides a kind of improved preparation of polypropylene pearlescent synthetic paper, it has covering property, hear resistance, the gross thickness that increases the pearlescent synthetic paper product and reduces cost.
At single-screw extrusion machine (extruder) processing procedure because of considering the dispersion problem of inorganic powder, all can only use inorganic powder and resin dispersion, fusion to mix into ready-made compound grain (MasterBatch),, enter again and carry out melt extruded in the extruder with after polypropylene mixes in extruder inlet; Because in the compound grain fabrication stage, for considering the dispersiveness of inorganic powder, in processing procedure, all can use dispersant (as coupling agent, calcium stearate etc.) to come that inorganic powder is done the surface and handle, better productivity (avoiding the extension rupture of membranes) and product appearance quality, paper homogeneity can be arranged to reach at the pearlescent synthetic paper processing procedure; But the compound grain of the inorganic powder that includes dispersant and make moist because of moisture absorption, mixed down by screw rod high temperature, can make wherein dispersant composition and moisture content evaporate into gas, be coated in the melting charge, use and contain the hollow hole in the sheet material after the cooling of extruder and exist, make the finished product after back segment extends have bubble to produce unusually, therefore to the prescription condition of production, process conditions must be controlled.
For making inorganic powder amount can be stranded product purpose, quality can both meet down, adopts the target of whatever you like addition manner to reach, and the present patent application people company takes dispersant and moisture content in the compound grain away, avoids causing the unusual generation that reaches in the production on the quality; And adopt following two kinds of processing modes, be described as follows:
(1) with various materials required in the extruder, earlier make total compound grain, and granulator picks up from right exhaust or air suction mode with granulator, can be with residual dispersant or moisture content, and the composition that is easy to evaporate into gas removes, and produces with total compound grain again.
(2) three single-screw extrusion machines in processing procedure, carry out apparatus modifications, modified screw structure (make decompression section) and set up air extractor, with residual dispersant and moisture content or the composition that is easy to evaporate into gas detach, make sheet material after the cooling of extruder, no matter all have the hollow hole and exist because of great inorganic powder adds.
Above-mentioned two kinds of improvement modes all can reach the quality-improving such as screening rate, hear resistance, gross thickness of product and the target that cost reduces; Wherein more favourable to production cost and on-the-spot materials, storage management in (two) kind mode.
With the single-screw extrusion machine pearlescent synthetic paper that processing procedure produced of bleeding because inorganic powder addition can be unrestricted, so benefit aspect product quality lifting and the cost reduction quite big, for aforementioned known techniques is failed announcement person; Now advantage of the present invention is described as follows:
(1) screening rate promotes:
At the prepared pearlescent synthetic paper of two-way extension processing procedure, covering property of product depends on compound grain addition and inorganic powder addition; If inorganic powder can add in a large number, product foaminess (in the extension) promptly better, it is just better that it produces light barrier performance, so can maybe need not descend compound decrement, can reach the requirement of covering property of height.
(2) hear resistance promotes:
Inorganic powder is better than polypropylene to the barrier performance of heat, wherein to use calcium silicates and talcous effect better, so under a large amount of interpolations of inorganic powder, except that inorganic powder can promote the product heat-resisting effect, high foaminess because of inorganic powder causes also has sizable benefiting.
(3) gross thickness promotes:
Inorganic powder addition and product proportion have very big relation, and product proportion is the key of product thickness decision especially; With the total raw material input amount, than the effective reduction of Beijing South Maxpower Technology Co. Ltd, the product gross thickness can promote naturally as if product.
(4) cost reduces:
Inorganic powder addition can improve, and just can reduce (2) product proportion reduction time to (1) materials formulation cost, also can reduce with the paper cost of area.
Above-mentioned four advantage product quality promote and the cost reduction is reached, and more can make the more extensive demand that is extended to industrial paper packaging material of pearlescent synthetic paper.
Two-way stretched polypropylene pearly synthetic paper of the present invention is a three-decker, its foamed interlayer is that single screw rod master extruder by a tool air extractor is to containing cis 97% above high crystalline polypropylene 96-30 weight %, antistatic additive 1-5 weight %, the compound grain of calcium carbonate 3-50 weight %, the compound grain of titanium dioxide 0-15 weight % is by the laggard extruder of becoming owner of of the even stirring of the feeding mouth of main frame front end, mix evenly via main extruder list screw rod, and after taking out volatilization gas by air extractor, the composition of resin and inorganic powder is clamp-oned in the intermediate flow channel of mo(u)ld bottom half die head; In addition, paper layer or resin bed are two single screw pair extruders with the tool air extractor, to containing polypropylene 100-40 weight %, polyethylene 0-20 weight %, the compound grain of calcium carbonate 0-35 weight %, the compound grain of titanium dioxide 0-20 weight %, antistatic additive 0-5 weight %, antiplastering aid 0-5 weight %, the feeding mouth that ultra-violet absorber 0-5 weight % is incorporated in secondary machine front end evenly enters secondary extruder after the stirring, and after secondary extruder list screw rod mixes evenly, and after taking volatilization gas away by air extractor, the composition of resin and inorganic powder is clamp-oned in the outer side runner of mo(u)ld bottom half die head; Above-mentioned three extruder extrudate are confluxed and are squeezed out in three-layer co-extruded pressure mode through an anvil swage head, form the plate of resin bed or paper layer/foamed interlayer/resin bed or paper layer, and through two-way extension, sided corona treatment, batch and 25-250 μ is two, the pearlescent synthetic paper of single face paper or two-sided superbright face; As shown in Figure 1.
The prepared pearlescent synthetic paper of the inventive method is not only applicable to cultural paper, more can extensively be extended to industrial paper purposes, the employed raw material type of its processing procedure and characteristic, is described as follows:
Acrylic resin used in the present invention is for selecting the homogeneous polymer that mostly is cis (ISOTACTIC) greatly of melt index (hereinafter to be referred as MFI) 0.5-12 (230 ℃/2.16Kg ASTMD1238) for use, can cooperate extension ratio to control the mechanical strength and the thickness evenness of pearlescent synthetic paper by selecting different MFI values and molecular weight distribution raw material for use; For using the paper layer can reach the imitative papering effect of various luster degree, polyethylene can be selected the grade of MFI0.1-14 for use in addition.
The inorganic powder that the inventive method is used, it mainly acts on is to reduce product density, improves covering property, hear resistance, gross thickness, more can make the paper layer, produces good fluent writing and the printability that is different from general plastic paper; Inorganic powder can be selected the multiple use of a kind of or fusion from the colony that calcium carbonate, calcium silicates, talcum powder, barium sulfate, diatomite, titanium dioxide etc. form for use; Its particle size range is 0.1-10 μ person, and particle diameter and consumption are decided on the purposes and the quality demand of product; But must be prefabricated into the compound grain of inorganic powder earlier, it uses dispersant kind and concentration, also need look the kind of inorganic powder and product purpose and determines; Can use the compound grain of titanium dioxide in addition, further carry out opacity, whiteness, anti-ultraviolet quality adjustment, this also decides on product purpose.
The inventive method employed anti-quiet dose can adopt existing general biaxial stretched polypropylene (BOPP) used anti-quiet dose all can, its main person be the tertiary amine class, by the dividing a word with a hyphen at the end of a line property of electric charge of tertiary amine class to eliminate because of the rub electrostatic effect of generation of processing.
The inventive method produces bonding mutually when preventing to batch pearlescent synthetic paper aborning between paper, need to add antiplastering aid in addition; The general biaxial stretched polypropylene of this optional enchashment row is employed, for example any of silica (SILICA), clay (CLAY), polymethyl methacrylate (PMMA), bead (CLASSBEAD) etc.
The specific gravity range of the polypropylene pearlescent synthetic paper goods that the inventive method makes is between 0.5-0.89, this can be according to product purpose, and cost needs to change and give adjustment with the constituent prescription, and purpose is to make the consumer can be under same units weight, more usable floor area is arranged, in using more economically.
The two-way stretched polypropylene pearly synthetic paper that the inventive method makes is the three-decker of adopting paper layer or resin bed/foamed interlayer/paper layer or resin bed, its product rerum natura, production capacity with the use prescription, be equipped with, behaviour's part condition has inseparable relation; Characteristics of the present invention are processing procedure ability that inorganic powder can be added in a large number, and this is to be on the two-way extension processing procedure, for dealer around here faces maximum test, and for known techniques institute can't the person of reaching.
Below device, the step of polypropylene pearlescent synthetic paper 25-250 μ single, double the snow facial tissue Flour product that makes with regard to the inventive method and the two-sided superbright facial tissue Flour product processing procedure conjunction with figs. of being adopted, be described as follows, wherein:
Fig. 1 is three kinds of three-layered node compositions producing 25-250 μ biaxial stretched polypropylene pearly synthetic paper with the improvement processing procedure one of single-screw extrusion machine;
Fig. 2 is manufacturing installation figure of the present invention.
(1) (1) among extruder assembly Fig. 2:
Comprise single screw rod master extruder of a tool air extractor and single screw pair extruder of two tool air extractors, its temperature imposes a condition and the vacuum of air extractor is subjected to material combination, MFI, degree of crystallinity, the viscosity of resin combination and produce the difference of linear speed, product thickness and different, only typical temperature is set in 180 ℃ of-280 ℃ of scopes, and vacuum is set in the 0--760mm-Hg scope usually.
(2) (2) among cooling forming wheel apparatus Fig. 2:
Can adopt water-cooled or ventilation type cooling device, be that the melt extruded thing through high temperature 180-280 ℃ three-layer co-extruded extrusion is given cooling type; Whether the control of the chilling temperature of this processing procedure proper, with fabrication steps thereafter smoothly whether, very big association is arranged; Its chilling temperature is set between 15-65 ℃ usually, decides on the thickness and the production linear speed of synthetic paper plate, can appropriateness adjust in this scope.
(3) (3) in the longitudinal extension installation drawing 2:
Cardboard through cooling forming is sent into this device, give preheating at 115-150 ℃ (deciding) earlier on required cal(l)iper that makes and production linear speed, make cardboard softening, do low speed and extension at a high speed with two sections again, give synthetic paper in mechanical strength longitudinally, give the tempering setting again, the longitudinal extension multiplying power is to be set in 3-6 doubly usually.
(4) (4) in the horizontal expansion installation drawing 2:
To through behind the above-mentioned longitudinal extension than presspaper earlier between 140-195 ℃ (on cal(l)iper and produce linear speed and decide) give pre-thermal softening, remake this horizontal expansion, give the tempering setting at last again, make pearlescent synthetic paper make partly retraction increase dimensional stability.Usually the horizontal expansion multiplying power is set in 5-12 doubly, and this can require according to the characteristic of goods and decide.
(5) (5) among corona treatment plant Fig. 2:
This processing is for making pearlescent synthetic paper can improve the physical characteristic of paper, enables to be suitable for printing, different processing purposes such as coating, gluing, applying; Processing power is that 20-120kw high frequency electric discharge device (look the production linear speed and give adjustment) carries out the single or double sided corona treatment, makes the wetting tension on surface reach 36-48dvne/cm.
(6) (6) among devices for taking-up Fig. 2:
Be to utilize a metal tube that the above-mentioned pearlescent synthetic paper of finishing of producing is coiled into the wide finished product of 8M, thereafter also can be according to optionally giving itemize, cutting into slices, be bundled into 25-250 μ package or product on chip.
According to the two-way stretched polypropylene pearly synthetic paper of the prepared thickness 25-250 of the inventive method μ, the following explanation of its threeply degree ratio:
Paper layer and resin layer thickness can be between 1-30 μ, look product demand and adjust.Now understand technology contents of the present invention, produce the pearlescent synthetic paper of 25-250 μ various characteristics and purposes through this two-way extension processing procedure with the pp material system for making; Now produced with the following example explanation the inventive method write, the industrial stationery pearlescent synthetic paper of cultural paper such as printing and packing timber purposes; Only this is not as the category that limits patent of the present invention.
Embodiment 1:(thickness 250 μ following single face paper pearlescent synthetic paper such as attached sample one, two, three) with polypropylene (MFI:2.0) 69 weight %, antistatic additive 3 weight %, the compound grain of calcium carbonate 20 weight %, the compound grain of titanium dioxide 8 weight %, mix and to mix in the back enters its air extractor by feeding mouth single screw rod master extruder and bleed, in addition with polypropylene (MFI:2.4) 60 weight %, polyethylene (MDI:1) 11 weight %, antistatic additive 2 weight %, antiplastering aid 1 weight %, the compound grain of titanium dioxide 5 weight %, the compound grain of calcium carbonate 20 weight %, ultra-violet absorber 1 weight % is with after mixing, enter by feeding mouth and mix in the single screw pair extruder of #1 of tool air extractor and bleed, in addition with polypropylene (MFI:2.4) 97 weight %, antiplastering aid 3 weight % are by in the single screw pair extruder of the #2 that enters its air extractor after mixing; And under 200-280 ℃ of extruder temperature, be total to the extrusion mode through the extrusion of mo(u)ld bottom half die head with three layers, through cooling wheel under 15-60 ℃ of temperature range, with the cold synthesis type of polypropylene pearlescent synthetic paper plate, the cardboard of moulding enters vertical extension apparatus, is set under 120-150 ℃ in temperature, gives preheating earlier, remake 5 times of longitudinal extensions, give the tempering cooling after the extension again; Enter the horizontal expansion device after the cooling again, under temperature is set 150-185 ℃, give preheating earlier, remake 9 times of extensions, give the tempering cooling after the extension again, processabilities such as good printing, coating, applying are arranged, batch with coiling machine more at last with the control synthetic paper.Make the following single face paper pearlescent synthetic paper of 250 μ in the above described manner,, more can be widely used in printing, write, pack purposes except that replacing brown paper, art paper or drenching again the release liners coating base stock purposes of film PE.
Thickness 80 μ, 100 μ that make with present embodiment, the single face paper pearlescent synthetic paper rerum natura of 150 μ (as attached sample one, attached sample two, attached sample three) are as shown in the table.
The manufacturing example that the high inorganic powder of the two-sided superbright facial tissue of embodiment 2:(thickness 70 μ face pearlescent synthetic paper adds is as attached sample four)
The compound grain of polypropylene (MFI:1.6) 52 weight %, antistatic additive 3 weight %, calcium carbonate 45 weight % are mixed mix in the back enters the tool air extractor by inlet single screw rod master extruder and bleed, after in addition polypropylene (MFI:2.4) 94 weight %, antistatic additive 2 weight %, antiplastering aid 2 weight %, ultra-violet absorber 2 weight % being mixed, enter respectively and mix in the single screw pair extruder of tool air extractor #1, #2 and bleed; And under 200-280 ℃ of extruder temperature, the vacuum of bleeding is to-700mmHg, be total to the extrusion mode through the extrusion of T pattern head with three layers, through cooling wheel under 15-60 ℃ of temperature range, with polypropylene pearlescent synthetic paper plate cooling forming, the cardboard of moulding enters vertical extension apparatus, is set under 120-150 ℃ in temperature, give preheating earlier, remake and give the tempering cooling behind 5.5 times of longitudinal extensions again; Enter the horizontal expansion device after the cooling again, under temperature is set 150-185 ℃, give preheating earlier, remake 9 times of extensions, give the tempering cooling after the extension again, with the relaxation shrinkage of control synthetic paper; After going out the horizontal expansion device, bury through the corona place again, make synthetic paper have processing such as good printing, coating, applying good, batch with coiling machine more at last; The pearlescent synthetic paper proportion that makes the two-sided superbright face of 70 μ in the above described manner is extremely low, can replace the brown paper material and be used for drenching the former pocket of brown paper, the bag with fertilizer of film applying PE layer, the packing purposes of bag of cement with PP, PE braid over braid; Make the following expression of two-sided superbright face pearlescent synthetic paper rerum natura of thickness 70 μ (as attached sample four) with present embodiment:
The manufacturing example that the high inorganic powder of the two-sided paper pearlescent synthetic paper of embodiment 3:(thickness 120 μ adds is as attached sample four)
The compound grain of polypropylene (MFI:1.6) 52 weight %, antistatic additive 3 weight %, calcium carbonate 45 weight % are mixed mix in single screw rod master extruder that the back feeding mouth enters the tool air extractor and bleed, enter respectively after in addition polypropylene (MFI:2.4) 60 weight %, the compound grain of titanium dioxide 7 weight % being mixed and mix in the single screw pair extruder of tool air extractor #1,2# and bleed; And under 200-280 ℃ of extruder temperature, the vacuum of bleeding is to-750mmHg, be total to the extrusion mode through the extrusion of T pattern head with three layers, under 15-60 ℃ of temperature range, with polypropylene pearlescent synthetic paper plate cooling forming, the cardboard of moulding enters vertical extension apparatus through cooling wheel, fix under 120-150 ℃ in the temperature setting, give preheating earlier, remake 4.5 times of longitudinal extensions, give the tempering cooling after the extension again; Enter the horizontal expansion device after the cooling again, be set under 150-190 ℃, give preheating earlier, remake 9 times of extensions, give the tempering cooling after the extension again, with the relaxation shrinkage of control synthetic paper in temperature; After going out the horizontal expansion device, bury through the corona place again, make synthetic paper that processabilities such as good printing, coating, applying be arranged, batch with coiling machine more at last; Make the two-sided cloudy surface paper of 120 μ pearlescent synthetic paper in the above described manner, proportion is extremely low, can be used for the printing purposes of namecard and book cover; Make according to present embodiment shown in the following expression of two-sided superbright face pearlescent synthetic paper rerum natura of thickness 120 μ (as attached sample five):
Claims (1)
1, a kind of improved preparation of polypropylene pearlescent synthetic paper, it is characterized in that, be by melt index MFI0.5-12 high crystalline acrylic resin 96-30 weight % and the calcium carbonate compound grain 3-50 weight % of cis degree more than 97%, the compound grain of titanium dioxide 0-15 weight %, the polypropylene resin composite that anti-quiet dose of 1-5 weight % forms reaches by polypropylene 100-40 weight %, polyethylene 0-20 weight %, the compound grain of calcium carbonate 0-35 weight %, the compound grain of titanium dioxide 0-20 weight %, antiplastering aid 0-5 weight %, ultra-violet absorber 0-5 weight %, the polypropylene resin composite that forms, respectively by single screw rod master extruder of a tool air extractor and single screw pair extruder of two tool air extractors, adopting the feeding mouth enter material way bleeds and pushes through giving mixing under 180-280 ℃ of extruder temperature and vacuum 0-750mmHg, and give confluxing and squeeze out through same lower die head, make into the pearlescent synthetic paper plate, through 15-65 ℃ of but moulding, this plate given two-way extension thereafter, under 115-150 ℃, do preheating, extend, the longitudinal extension of the 3-6 extension ratio that tempering place is buried, send into design temperature again and under 140-195 ℃, do preheating, extend, the horizontal expansion of the 5-12 that tempering place is buried times extension ratio, high frequency sided corona treatment under 20-120kw power again, coil into paper layer/foamed interlayer/paper layer of thickness 25-250i again with coiling machine, paper layer/foamed interlayer/resin bed, the coating base stock of three kinds of three-layer co-extruded pressure polypropylene pearlescent synthetic paper persons such as resin bed/foamed interlayer/resin bed and conduct coating level synthetic paper.
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| CNB991111591A CN1133535C (en) | 1999-07-28 | 1999-07-28 | Improved polypropylene pearlescent synthetic paper making method |
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| CNB991111591A CN1133535C (en) | 1999-07-28 | 1999-07-28 | Improved polypropylene pearlescent synthetic paper making method |
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| CN102862353B (en) * | 2012-09-25 | 2015-04-08 | 佛山市塑兴母料有限公司 | Synthetic paper and preparation method thereof |
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| CN106182836B (en) * | 2016-08-29 | 2019-04-09 | 江苏诚盟装备股份有限公司 | Polymer composite paper production equipment |
| WO2018176770A1 (en) * | 2017-03-31 | 2018-10-04 | 宿迁市金田塑业有限公司 | Bopp pearlized film and manufacturing method therefor |
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Assignee: South Asia plastic film (Nantong) Co., Ltd. Assignor: Nanya Plastics Industry Co., Ltd. Contract fulfillment period: From January 5, 2005 to January 5, 2010 Contract record no.: 051000030089 Denomination of invention: Improved preparation of polypropylene pearlescent synthetic paper Granted publication date: 20040107 License type: exclusive license Record date: 20051010 |
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Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2005.1.5 TO 2010.1.5 Name of requester: NANYA RUBBER GLUE FILM( NANTONG ) CO., LTD. Effective date: 20051010 |
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