CN104972720B - Layer structure synthetic paper and preparation method thereof - Google Patents
Layer structure synthetic paper and preparation method thereof Download PDFInfo
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- CN104972720B CN104972720B CN201410139530.4A CN201410139530A CN104972720B CN 104972720 B CN104972720 B CN 104972720B CN 201410139530 A CN201410139530 A CN 201410139530A CN 104972720 B CN104972720 B CN 104972720B
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Abstract
The invention discloses a kind of layer structure synthetic paper and preparation method thereof, mainly default form material is fabricated to 56~80% inorganic mineral powders, 18~43% polyolefin and 1~2% additive, introduce single screw rod extruder to be melted, be kneaded, be made after T-shaped mould head extrusion molding, extension.Described layer structure synthetic paper includes the class layer structure being made up of the clad in intermediate layer and intermediate layer both sides, and intermediate layer is the equally distributed inorganic mineral powder after mixing and the uniformly mixed matter layer of the polyolefin of its periphery cladding；The polyolefin resin layer that clad is formed by intermediate layer by diffusion, migration.The present invention directly obtains a kind of internal layer as polyolefin and inorganic filler, the class layer structure of outer surface cladding polyolefin resin layer by single screw rod extruder extrusion, it is greatly enhanced the content of inorganic mineral powder in synthetic paper, equipment investment and cost of manufacture are reduced, while reaches the purpose of simplified manufacturing process.
Description
Technical field
The present invention relates to a kind of synthetic paper and preparation method thereof, more particularly to a species layer structure synthetic paper and its system
Make method.
Background technology
Synthetic paper (synthetic paper), is called stone film paper, chemical industry film paper, polymer paper, plastic paper etc., be with
The resins such as polyolefin and inorganic filler be primary raw material, is process by squeezing, prolonging extrusion or film-blowing process, had simultaneously
The multi-functional material of the feature of plastics and paper.Synthetic paper is a kind of new plastic material product, and a kind of environment-friendly products,
With light specific gravity, intensity is big, tear-proof, and printing is good, shading, uvioresistant, durable in use, it is economic and environment-friendly the features such as.
Synthetic paper has the development history of more than 30 years abroad, especially in developed countries such as the U.S., Japan, Canada, in
State's Taiwan starting is more early, and development is very fast.With the reinforcement of global environmental consciousness, the development of synthetic paper, new conjunction are accelerated
Into the emergence of paper product kind, the application of synthetic paper is expanded.At present, the worldwide sales of paper product are synthesized every year with
10% speed increase, the paces of synthetic paper part substitution general fibre paper are being accelerated.
By the difference of structure, synthetic paper is divided into individual layer synthetic paper, three layers of synthetic paper, five layers of synthetic paper etc..The system of synthetic paper
It is production equipment that work, which need to often adopt extruder, and the synthetic paper with layer structure generally needs multiple processes, or uses more extruders.
A kind of method is by after resin and inorganic filler extrusion molding, and polypropylene etc. is bonded in its superficial layer again as internal layer or outer layer
After resin film, re-extend to be formed to obtain required sandwich construction, such as CN 96105403.4, CN 99808806.4.Another kind side
Method is to obtain required sandwich construction using the method for multiple extruders coextrusion, as CN94217511.5 discloses one kind poly- third
Alkene synthetic paper and its manufacture device, it is in a manner of three-layer co-extrusion, to polypropylene resin composite and resin combination point by one
The main extruder of platform and two secondary extruders are extruded, and conflux through same T-shaped die head extrude and form paper layer/intermediate layer/
The plate of paper layer, then handled through cooling and shaping, twin shaft extension, corona etc., and apparent thickness needs to pass through after giving lamination fitting again
The synthetic paper batched.Using this method make stratiform synthetic paper also include CN97104273.X, CN99105768.6,
CN99111159.1, CN03135321.5 and CN201210031029.7 etc..CN03156314.7,200510095687.2 public affairs
Five layers of synthetic paper and preparation method thereof have been opened, have been to be made using the method for 5 extruder coextrusion.
As described above, the existing stratiform synthetic paper that industry makes at present is quite a lot of in implementation, wherein being no lack of by more
Platform extruder or multiple tracks manufacturing process program are come the synthetic paper of plural layer and required increase thickness needed for molding.It is existing to take off act
Stratiform synthetic paper and preparation method thereof, numerical example correlation implementation means are enumerated again herein, such as Taiwan notification number：305805th, " it is combined
Synthetic paper " invention case, Japanese Prince Oil Synthesis Paper Co., Ltd's Japanese Patent Publication 46-40794, Japanese Unexamined Patent Publication 3-
No. 87255 Patent Cases, the Dampler Ace that this kind of intermediate course includes inorganic mineral powder are molding required thickness by extruder
Synthetic paper, still need by being further bonded polypropylene screen in double outer surfaces and make to form two appearance mask virgin pp films as extension
The cladding of material, there are loose dust structure and the table to be continued after with the Dampler Ace surface for improving middle calcium carbonate powder
Face printing tends to have the defect of printing dry linting.The and for example patent announcement number in Taiwan：379272nd, " manufacture method of environment protecting paper " is invented
Case, disclosed single or multiple lift blow the hollow tube that polyethylene synthetic paper shapes gained by blown film processing procedure (blown film) altogether
Film, absolute being have uneven thickness and surface to have dry linting phenomenon because height extends processing procedure, therefore obtain and implement subsequent handling benefit again
Qiang Ru：Heating is prolonged repoussage and put down with surface coating film protection layer to prevent phenomenon out of dust.For another example the notification number in Taiwan：252174th, " three
The manufacture method of layer co-extrusion pressure biaxial stretched polypropylene (BOPP) pearlescent synthetic paper " invention case, the synthetic paper of this three layers common extrusion
Outside is pure plastic layer, and to protect the centre sandwich of the easy dry linting of calcium carbonate content at high proportion, this is by increase synthetic paper two
High carbon acid calcium content is mixed into needed for paper with PP among the pure plastics protections of extrusion PP altogether in outside, must increase extra common extruder
It hardware, will increase manufacturing cost.
The content of the invention
The missing that the present invention has according to existing stratiform synthetic paper in making, with regard to design on material structure, reduce material
Cost further improves with simplifying manufacturing process, it is desirable to provide species layer structure synthetic paper and preparation method thereof, leads to
Cross single screw rod extruder extrusion and directly obtain a kind of internal layer and coat polyene for vistanex and inorganic filler, outer surface
The class layer structure of hydrocarbon resin layer, to be greatly enhanced the content of the inorganic mineral powder such as calcium carbonate in synthetic paper, reduce equipment investment
And cost of manufacture, while reach the purpose of simplified manufacturing process.
To achieve the above object, the technical solution adopted in the present invention is as follows：
One species layer structure synthetic paper, is to be added using vistanex and inorganic mineral powder as primary raw material by extrusion process
Work forms, it is characterised in that described synthetic paper includes the class stratiform being made up of the clad in intermediate layer and intermediate layer both sides
Structure, described intermediate layer are the uniform of the polyolefin of equally distributed inorganic mineral powder and inorganic mineral powder periphery cladding after mixing
Mixed matter layer；The polyolefin resin layer that described clad is formed by intermediate layer by diffusion, migration.
The present invention class layer structure synthetic paper class layer structure therein by single screw rod extruder extrusion molding,
Formed after extension.Raw polyolefin resin and inorganic mineral powder composition are melted in extruder, are kneaded, material main body for mainly by
The uniform mixture of inorganic mineral powder and fused polyolefin composition, part polyolefin gradually expand by thermograde with viscosity gradient
Dissipate, migrate to the outer surface of material, obtain being coated on the polyolefin resin layer of intermediate layer both sides after T-shaped mould head extrusion.It is different
Method is coextruded in more extruders, described polyolefin resin layer is very thin, about 0.5~5 micron of thickness, remains to form homogeneous bag
Coating, and be enough to prevent intermediate layer from occurring dry linting phenomenon in following process and use.
Class layer structure can significantly improve the content of inorganic mineral powder in synthetic paper in described synthetic paper, with weight percent group
Into meter, the class layer structure of synthetic paper of the present invention includes 56% to 80% inorganic mineral powder, separately contains 18% to 43% polyolefin
With 1% to 2% additive.Can be by 56% to 80% weight inorganic mineral powder, 18% to 43% weight polyolefin and 1% to 2% weight
Amount additive is fabricated to default form material, is melted, is kneaded with introducing exclusive extruder, and it is polyolefin to make to form outside
Layer and middle part are that the fused polyolefin inorganic mineral powder for combining the mixed layer for coating polyolefin with inorganic mineral powder and periphery combines
Thing, then after extrusion for an intermediate layer include homogenous mineral miberal powder and periphery is coated with mixed matter layer and two outsides of polyolefin
The class layer structure of the tool preset thickness formed for polyolefin layer synthesizes paper membrane.
Another object of the present invention is to provide a kind of preparation method of the class stratiform synthetic paper, with vistanex and
Inorganic mineral powder is primary raw material, preferably 56% to 80% weight inorganic mineral powder, 18% to 43% weight polyolefin and 1% to 2%
The composition of weight additive, default form is made by continuous mixing banburying in described composition, is sent into temperature setting
In single screw rod extruder, composition is melted in extruder, mixed, vacuum exhaust, through T-shaped mould head extrusion molding, forms class
Layer structure paper membrane；Again through prolonging pressure, Longitudinal extending, extending laterally, cooling of shaping, eliminate stress processing, described class layer is made
Shape structure synthetic paper.
In the present invention, described screw rod extruder includes barrel and the screw rod that combines therebetween, and described screw rod is along material flow
Dynamic direction is made up of pan feeding section, compression section and kneading diffuser, and the kneading diffuser includes more than at least two screw rod tables
Face sets barrier (diffusive migration) area of different default form convex portion structures, and makes the convex portion structure of kneading diffuser screw surface
In distributional pattern interlaced with each other, repeatedly shunting is able in Flow of Goods and Materials to be made evenly to be kneaded and finally reach layer with multi-reflow
Streaming architecture.
Class layer structure paper membrane is by the single direct extrusion molding of screw rod extruder in the present invention, in response to class stratiform knot
Structure synthesizes the extrusion machine-shaping of paper membrane, and new design is carried out to being incorporated in screw rod of the extruder therebetween inside barrel.Extruder
Screw rod, which is generally distinguished, has pan feeding section, compression section, metering section (paragraph rearward) to be formed；The knot that the present invention is carried out to extruder screw rod
Structure improvement includes, and the paragraph rearward of screw rod is set to 1/2 to the 1/3 kneading diffuser that a length is overall spiro rod length,
The kneading diffuser screw rod face is to set at least two different default form convex portion structures contained above (to include but is not limited to laterally
Rectangle, square, semicircle, arc are dashed forward shape etc.) baffle area, and make the convex portion structures of kneading diffusion district screw rod EDS maps be in each other
Interleaved form；With sharp fused polyolefin and inorganic mineral powder when introducing the kneading diffuser, what is be distributed therebetween includes convex portion
The baffle area of structure forms the circulation shunting and backflow progressively back and forth to move forward, the melting inorganic mineral powder polyolefin composition is obtained
Obtain and be sufficiently uniformly kneaded, and include the composition of different specific heats at least two therebetween by melting inorganic mineral powder and polyolefin,
During multiple circulation shunting and multi-reflow the higher polyolefin of specific heat can be made by diffusive migration to outer layer and specific heat is relatively low
Inorganic mineral powder polyolefin composition then progressively moved forward along screw rod top layer face under shunting and backflow so that class stratiform melt nothing
Machine miberal powder polyolefin composition lead to screw rod end can for barrel one end with reference to T-shaped mould head extrusion form one needed for class
Stratiform synthesizes paper membrane.
It will be apparent to those skilled in the art that class layer structure synthetic paper of the present invention, can also be in class stratiform knot
At least one layer of extra play above of one or both sides increase of structure.Extra play can be vistanex, polyolefin composition etc.,
Extra play formed mode include multilayer altogether extrusion (co-extrusion), film fitting (extrusion lamination) and
The techniques such as universe formula fitting (dry lamination).Described class layer structure synthetic paper, also purposes can be regarded according to prior art
It is surface-treated, changes synthetic paper surface characteristic to adapt to different use occasions and needs, printing, resistance are such as provided
The specific functions such as oxygen, oil resistance be water-based.
With reference to specific embodiment, the present invention will be described in detail.Protection scope of the present invention is not with specific implementation
Mode is limited, but is defined in the claims.
Brief description of the drawings
The schematic cross-section of the three-layer type class stratiform synthetic paper of Fig. 1 present invention.
The schematic cross-section of the five laminar class stratiform synthetic papers of Fig. 2 present invention.
The SEM/EDS spectrograms of class layer structure in Fig. 3 present invention.
Calcium carbonate and polypropylene composition schematic diagram on class layer structure cross section in Fig. 4 present invention.
The structural representation of extruder in Fig. 5 present invention.
Fig. 5-1 is the partial enlarged drawing at Fig. 5 A positions.
Fig. 5-2 is the partial enlarged drawing at Fig. 5 B positions.
Fig. 5-3 is the partial enlarged drawing at Fig. 5 C positions.
Screw rod in molten plastic and inorganic mineral powder composition to introducing progressively shunt and collaborate in Fig. 6 systems present invention
Implementation schematic diagram.
Embodiment
Technical solutions according to the invention are described in further detail below by embodiment, but are necessary
Point out that implementation below is served only for the description to the content of the invention, do not form limiting the scope of the invention.
The class layer structure synthetic paper of the present invention, (wherein the 1st figure is closed for three-decker class stratiform as shown in Figure 1 and Figure 2
It is for five-layer structure class stratiform synthetic paper into paper, the 2nd figure), the class formed comprising the clad 1 by intermediate layer 3 He its both sides
Layer structure, such middle part of stratiform synthetic paper 4 are a uniform calcium carbonate (CaCO3) and the mixed layer of polypropylene, i.e., it is middle
(calcium carbonate is mainly made up of layer 3 with the mixed layer of polypropylene calcium carbonate and polyolefin, is to include inside to wrap for calcium carbonate 31, periphery
Cover the mixed distribution layer of inorganic powder based on a layer polypropylene 11), the both sides of intermediate layer 3 are that nationality diffusion mobility one of obtains uniformly
Polypropylene (Polypropylene, PP) resin bed, i.e. clad 1.Outside described clad 1, more than one layer can also be included
Extra play 2, in five-layer structure class stratiform synthetic paper as shown in Figure 2, outside class layer structure, respectively there is a polypropylene group both sides
Compound layer.
In above-mentioned class layer structure synthetic paper, mainly composition is polypropylene to clad 1, about 0.5~5 micron of thickness, by list
One screw rod extruder extrusion molding, formed after extending.Raw material polypropylene and calcium carbonate composition melt in extruder, are mixed
Refining, material main body are the uniform mixture being mainly made up of calcium carbonate and melt polypropylene, and polypropylene segment is by temperature ladder
Degree gradually spreads, migrated to the outer surface of material with viscosity gradient, obtains being coated on the both sides of intermediate layer 3 after T-shaped mould head extrusion
Polypropylene resin layer.Among present invention synthesis paper structure in interbed 3, because being the high carbon acid weight percent calcium in material main body
Content has relatively low average specific calorific value, in control extruder barrel and screw rod between temperature difference, extruder temperature higher than barrel 5~
Between 35 degree, there is relatively low dynamic viscosity (low viscosity) rheological characteristic via the material under low specific heat and higher temperature
(rheological property), by this thermograde and the high molecular laminar flow diffusivity of polypropylene, at barrel
Because temperature is relatively low higher with material avergae specific heat, relative viscosity is higher, so make polypropylene and polyene polymer by screw rod it
The clad that outermost is formed with migration is gradually spread toward the barrel of lower temperature in higher temperature side.
Above-mentioned class layer structure can be by high magnification electron microscope (SEM) and material composition analyzer (EDS) analytical table
Sign.Fig. 3 is the SEM/EDS spectrograms of the class layer structure, and the broken line in figure is respectively Ca, O and C for being superimposed elementary analysis letter
Number intensity.As seen from Figure 3, the intermediate layer of class layer structure is calcium carbonate and the mixed layer of polypropylene, and both sides are uniform poly-
Propylene clad.Drawn from elementary analysis, intermediate layer CaCO3Content is uniform, the diffusion of described cladding series of strata polypropylene, migration shape
Into with calcium carbonate as shown in Figure 4 and polypropylene composition distribution on class layer structure cross section.
The raw material of above-mentioned tool class layer structure synthetic paper is the group for including natural inorganic miberal powder, polyolefin and additive
Compound；Class layer structure therein includes：56% to 80% weight natural ore powder, 43% to 18% weight polyolefin and 1% to
2% weight additive.Described class layer structure synthetic paper be in making adopt with：
(1) adds 56% to 80% weight natural ore powder, 43% to 18% weight polyolefin and 2% to 1% weight
The composition of agent, graininess is manufactured into by continuously mixing close, refining cool drying, or by continuous mixing banburying manufacture strip
Shape is sent directly into extruder；
(2) again forms the mixture of dry particle shape or fusing strip mixture via extruder and T-shaped mould head
Synthesize paper membrane manufacturing machine in, regulation extruder composition is melted to design temperature, via extruder screw feed, mixing, very
Idle discharge gas, extrusion process, fused mass is delivered into quantitative machine, then through being sent into T-shaped mould head extrusion under quantitative, constant DP control, form class
Layer structure paper membrane；
(3) make again the paper membrane to be formed via prolong pressure, Longitudinal extending, extend laterally, cooling of shaping, eliminate stress processing, and
Take wheel to draw and formed through batching by drawing, form described sheet or the class stratiform synthetic paper batched.
In above-mentioned class layer structure synthetic paper and its manufacture method, the natural inorganic miberal powder of application may include through calcination or
Calcium carbonate, calcium silicates, carclazyte, kaolin, Cab-O-sil, titanium dioxide, talcum powder and its mixture are not calcined.It is preferred that with calcium carbonate
For the inorganic mineral powder of main component.
In above-mentioned class layer structure synthetic paper and its manufacture method, the preferred polyethylene of polyolefin of application, polypropylene or
It is their mixtures.Described polyethylene may include high density polyethylene (HDPE), low density polyethylene (LDPE), medium density polyethylene, linear low
Density and its mixture.Described polypropylene may include general homo-polypropylene (homo-polypropylene), combined polymerization poly- third
Alkene (co-polypropylene), random polypropylene (random polypropylene) or impact polypropylene (impact
Resistant polypropylene) and its mixture.
In above-mentioned class layer structure synthetic paper and its manufacture method, the addition agent aid of application includes lubricant, coupling
One or more in agent, UV resistant agent, bacteriostatic agent, antistatic additive, and colorant or plastic oil.
Above-mentioned class layer structure synthetic paper and its manufacture method application natural ore powder, polyethylene and/or polypropylene and
The composition of additive composition, by continuous mixing banburying, and it is set in through temperature 160 DEG C to 250 DEG C of extruder and is squeezed into
Shape goes out the class stratiform paper membrane of required thickness, then through drawing crop rotation Longitudinal extending and extending laterally, wherein Longitudinal extending is prolonged with horizontal
The ratio stretched can be 1: 1 to 1: 6, suggest herein preferable extruder operating temperature range be 220 DEG C~241 DEG C between.
In the present invention, class layer structure after single exclusive screw rod extruder extrusion molding, extension by making.Described
Class layer structure it is outer according to paper functional requirement is finally synthesizing, can such as be adopted with the layer outside plus in outer surface unilateral or bilateral
With common extrusion mode, using exclusive screw rod extruder as main extruder, increase one or more secondary extruder, secondary extruder is according to need
The dispensing wanted adds resin or resin combination is kneaded extruding, in foregoing step (2), by the fused mass of main extruder extrusion
Conflux with secondary extruder extrusion thing and extruded through same T-shaped die head, the paper membrane comprising class layer structure and extra play can be obtained.Separately
This outer similar species layer structure and the paper membrane of extra play can also manufacture by different process technology, as film is bonded
Extra play coating materials is adhered to the class stratiform of the present invention by the extrusion plastics of melting by (extrusion lamination) technique
Stone film paper, or dry adhered (dry lamination) technique by coating one mucigel link the present invention class stratiform stone film paper and
Extra play coating materials.
The extruder used in the synthetic paper film manufacturing method of the present invention may include：The extruder of single screw rod or twin-screw is made
To implement, and paper manufacture extruder can make individual layer extrusion or the common extrusion mode of multilayer is carried out to synthesizing.In description of the invention
Description is made etc based on multilayer synthetic paper with single extruder, and according to the record of specification, those skilled in the art are not difficult root
According to prior art, 5 Rotating fields class layer structures conjunction as shown in Figure 2 is made in a manner of common extrusion on the basis of class layer structure
Into paper.
In addition, if be further added by synthetic paper use thickness, can also according to product demand by film technique in synthetic paper table
Face directly applies film material, or with film attaching process manufacture method by another outer surface layer material superposition in synthetic paper it
On, it must can implement according to product purpose to carry out the film of engineering single or double after above-mentioned synthetic paper.
And above-mentioned synthesis paper membrane manufacture extruder can allow the composition for adding dry particle shape, or fusing strip to mix
Compound, or it is powdered, or graininess and powdered mixture are as implementation.
And above-mentioned synthetic paper manufacture extruder can act also as the form use of coated thermoplastic, wherein the class stratiform knot shaped
Structure synthetic paper surface characteristic can need to be surface-treated when must remake modification according to different application, carry out in the coating process of surface not
With stickiness surface conditioning agent, different coating arts techniques can be used：As comma coating (comma coater), slit apply
Cloth (slot die coater), intaglio plate coating (gravure coater), air-blade type coating (air knife coater) etc. come
Make the progress of surfaction engineering, online or off line surface corona processing (corona treatment) can also provide the present invention
Synthetic paper surface has high surface energy flow characteristic, then goes for the application that ink printing is bonded with viscose.
The class stratiform synthetic paper that above-mentioned synthetic paper manufacture extruder shapes, its thickness are micro- in 80 microns to 1000 with boundary
Rice be scope, if wherein thicker synthetic paper need to be manufactured, (extrusion lamination) can be bonded by film or dry type is pasted
Technologies such as (dry lamination) is closed to reach boundary in 1000 microns to 2000 micron thickness of lamination synthetic paper.
Screw-rod structure of the present invention between exclusive extruder its barrel of class stratiform synthetic paper is made be provided with：A.) melt
The pan feeding section of polypropylene and calcium carbonate plastics；B.) melting calcium carbonate plastics are imposed with the compression section of appropriate pressure；And C) compressing
The adjacent paragraph of section is provided with default different shape (such as a zone screws surface：Semi-circular, square, strip ... etc.) it is convex
The kneading diffuser of portion's structure, default shunting and backflow can be formed in the paragraph with the polypropylene to melting and calcium carbonate plastics
Path, while controlled by suitable temperature gradient distribution so that the rheology physical property that polypropylene has with calcium carbonate plastics
(Rheology property) forms the laminar flow phenomenon of a layer structure, and which part polypropylene can be migrated gradually to appearance
Face (thickness is to be implemented with 0.5~5 micron to be optimal after moving to the PP extensions of outer surface herein), and exclusive extruder its
Between T-shaped mould exit can then form the synthesis paper structure of a kind of stratiform.
As shown in Figure 5,6, in described exclusive extruder, screw rod 1, which is distinguished, to be had pan feeding section 11, compression section 12, is kneaded diffusion
Section 2 is formed；I.e. screw rod 1 paragraph rearward be set to one section kneading diffuser 2, set in the top layer face of kneading diffuser 2 to
Few two or more baffle areas 21 for including default form convex portion structure；Preferably, described baffle area 21 convex portion structure therein
It is that shape is dashed forward as implementation (the 3 of the 2, the 5th figure of the 1, the 5th figure of such as the 5th figure) using horizontal rectangle, square and arc, and horizontal rectangle
Convex portion structure 211, which is distributed in, is kneaded 2 forward paragraph of diffuser, and square convex portion structure 212, which is then distributed in, is biased against middle paragraph, arc
The convex portion structure 213 of prominent shape is then distributed in close to end, and makes to be arranged on the horizontal rectangle for being kneaded diffuser 2, square, the prominent shape of arc
The distribution of convex portion structure 211,212,213 be using 1: 3: 3 ratio as implement, and this section be kneaded the aspect of diffuser 2
The convex portion structure of distribution is to be necessary for the overall length of screw rod 1 in the form of offseting one from another, and to the length of the kneading diffuser 2
1/2 to 1/3, and the draw ratio (L/D) set to overall screw rod 1 be using boundary between 38/1 to 26/1 as implementation, it is and preferable
It is to be used as implementation using 35: 1.
Described kneading diffuser 2, enable fused materials by horizontal rectangular lip structure formed a larger resistance make by
The shunting and backflow of step, and make resistance lower slightly shunting and backflow when entering square convex portion structure, and the arc is contacted in end
Prominent shape convex portion structure can form resistance reduction and smoothly repeatedly shunting and multi-reflow, last Flow of Goods and Materials are formed once abundant
Class stratified fluid be kneaded, stable.
More than make class stratiform synthetic paper vistanex and inorganic mineral powder composition at least containing it is two or more not
With the component of specific heat, such as calcium carbonate (CaCO3) specific heat is 0.205 card/gram (20 DEG C), and the specific heat of polypropylene (PP) is 0.46
Card/gram DEG C.Calcium carbonate (CaCO therein3) be averaged with higher its of calcium carbonate weight percent in polypropylene (PP) kneading material
Specific heat of combustion is then relatively low, using heating of the screw rod of extruder therebetween to molten plastic is relatively fast, in cooling procedure, its cooling is dropped
Warm speed is also very fast, and the harmonic(-)mean specific heat causes there is the very fast phenomenon of heating and cooling on processing procedure.
The barrel internal temperature of above-mentioned exclusive extruder therebetween be can be appropriate control between 160 DEG C~250 DEG C, it is proposed that
Between preferable process operations temperature range is 220 DEG C~241 DEG C, so that melt polypropylene can be by this section of screw rod with calcium carbonate plastics
Paragraph provided with default form convex portion forms 5 DEG C of thermograde difference setting between default a shunting and backflow, and barrel and screw rod
Between~35 DEG C, best suggestion can regulate and control appropriate thermograde between 10 DEG C~25 DEG C, according to material prescription by setting, drive
Make calcium carbonate/plastics that there is laminar flow phenomenon, wherein temperature is relatively low on the inside of the barrel, the more upper cryogenic effect make plastics PP into
Part rheological characteristic flows down kinematic viscosity gradually increase and relative flow speed also step-down, this dual-temperature gradient and viscosity ladder in the environment
Degree change drives PP plastics (about 0.5~5 micron thickness after extension) gradually to migrate to lateral surface, and makes T-die export to be formed
Membranaceous material two sides be uniform PP compositions extexine, with inside be inorganic powder and the equally distributed class stratiform of polypropylene
Synthetic paper, and class stratiform synthetic paper surface is set in bright face/or cloudy surface and through stress elimination (i.e. tempering cool down) and is made
Volume/automatic is cut into required size.
The problems of for the existing stratiform synthetic paper of solution in making, the present invention utilizes the exclusive design of innovative technology
Extruder and special screw-rod structure, by the rheological behavior of material prescription in itself designs, screw rod section repeatedly shunts, multi-reflow
Control process conditions are set with thermograde, make that about 60% to 80% a high proportion of calcium carbonate can will be contained in material
(CaCO3) based on inorganic powder, polyethylene (Polyethylene, PE), the polyene such as polypropylene (Polypropylene, PP)
Hydrocarbon composition is kneaded material prescription, is controlled using plastics avergae specific heat diversity, rheological behavior and thermograde is kneaded, via exclusive
The extruder of design makes a variety of inorganic mineral powders based on calcium carbonate be mixed with melting of the polypropylene in screw rod leading portion gradually through spiral shell
The various projection cube structures in bar posterior segment section surface are (such as：Hemispherical, square, rectangle etc.) multiple shunting, multi-reflow and spiral shell
Thermograde is poor between bar and charging basket, makes to gradually form a stable class laminar fluid structure, the pure material polypropylene of high avergae specific heat
Composition gradually migrate to outside in close to material tube inner wall into a heavy bodied laminar flow (laminar flow), opposite polypropylene
The relatively low inside layered material of avergae specific heat after being uniformly kneaded with calcium carbonate (close to screw rod) because it is low than fuel factor in being kneaded frictional heat
Quick heating stablizes flat-shaped stream (plug flow) with high fluidity up to one.So obtained similar by the extrusion of extruder die head
Co-extrusion gives as security the synthesis paper membrane of class layer structure.
Claims (8)
1. a species layer structure synthetic paper, is to be processed using vistanex and inorganic mineral powder as primary raw material by extrusion process
Form, it is characterised in that described synthetic paper includes the class stratiform knot being made up of the clad in intermediate layer and intermediate layer both sides
Structure, described intermediate layer are mixed for the uniform of polyolefin of equally distributed inorganic mineral powder and inorganic mineral powder the periphery cladding after mixing
Matter layer；The polyolefin resin layer that described clad is formed by intermediate layer by diffusion, migration.
2. class layer structure synthetic paper according to claim 1, it is characterised in that described class layer structure is by screw rod
Formed after extruder extrusion molding, extension, vistanex and inorganic mineral powder composition are melted in extruder, be kneaded, part
Polyolefin spreads by thermograde and viscosity gradient, migrated to the outer surface of material, is coated on after T-shaped mould head extrusion
The polyolefin resin layer of intermediate layer both sides.
3. class layer structure synthetic paper according to claim 1 or 2, it is characterised in that described vistanex thickness
Spend for 0.5~5 micron.
4. class layer structure synthetic paper according to claim 1 or 2, it is characterised in that described polyolefin be polyethylene,
Polypropylene or their mixtures；Inorganic mineral powder be selected from calcium carbonate, calcium silicates, carclazyte, kaolin, Cab-O-sil, titanium dioxide or
Talcum powder, or their mixture.
5. class layer structure synthetic paper according to claim 1 or 2, it is characterised in that formed and counted with weight percent, it is described
The class layer structure of synthetic paper is consisting of 56~80% inorganic mineral powders, 18~43% polyolefin and 1~2% additive.
6. class layer structure synthetic paper according to claim 1 or 2, it is characterised in that described class layer structure synthesis
Paper includes the extra play of more than at least one layer in the one or both sides of class layer structure.
7. the preparation method of a species layer structure synthetic paper, using vistanex and inorganic mineral powder as primary raw material, by polyene
Default form is made by continuous mixing banburying in the composition of hydrocarbon resin, inorganic mineral powder and additive, is sent into the spiral shell of design temperature
In bar extruder, composition is melted in screw rod extruder, mixed, vacuum exhaust, through T-shaped mould head extrusion molding, forms class layer
Shape structure paper membrane；Again through prolonging pressure, Longitudinal extending, extending laterally, cooling of shaping, eliminate stress processing, described class stratiform is made
Structure synthetic paper；
Described class layer structure is made up of the clad in intermediate layer and intermediate layer both sides, and described intermediate layer is after mixing
The uniformly mixed matter layer of the polyolefin of equally distributed inorganic mineral powder and inorganic mineral powder periphery cladding；Described clad is intermediate layer
By the formed polyolefin resin layer of diffusion, migration；
Described screw rod extruder includes barrel and the screw rod combined therebetween, and described screw rod is along Flow of Goods and Materials direction by pan feeding
Section, compression section and mixing diffuser are formed, and it is different in advance that the mixing diffuser includes the setting of more than at least two screw surfaces
If the baffle area of form convex portion structure, and make the convex portion structure of mixing diffuser screw surface be in distributional pattern interlaced with each other；
Described method comprises the following steps：
(1) is by 56%~80% weight natural ore powder, 18%~43% weight polyolefin and 1%~2% weight additive
Composition, graininess is manufactured into by continuous mixing banburying, cool drying, or by continuous mixing banburying to be manufactured into strip straight
Pick into extruder；
(2) again forms the mixture of dry particle shape or fusing strip mixture feeding screw rod extruder and T-shaped mould head
Synthesize paper membrane manufacturing machine in, adjusting screw rod extruder to design temperature melts composition, described design temperature be 160 DEG C~
250 DEG C, temperature difference is set as between 5 DEG C~35 DEG C between barrel and screw rod；Via extruder screw feed, mixing, vacuum exhaust,
Extrusion process, fused mass is delivered into quantitative machine, then through being sent into T-shaped mould head extrusion under quantitative, constant DP control, form class layer structure
Paper membrane；
(3) makes the paper membrane to be formed via prolonging pressure, Longitudinal extending, extending laterally, cooling of shaping, eliminate stress processing again, and by drawing
Take wheel to draw and formed through batching, form described sheet or the class layer structure synthetic paper batched.
8. the preparation method of class layer structure synthetic paper according to claim 7, it is characterised in that the length of described screw rod
Footpath is than L/D circle between 38/1 to 26/1；Described mixing diffuser is the 1/2 to 1/3 of spiro rod length, by 3 sections of baffle area structures
Into screw surface sets the prominent shape convex portion structure of horizontal rectangle, square and arc respectively, and the convex portion structure distribution of horizontal rectangle is being kneaded
The forward paragraph of diffuser, square convex portion structure distribution in middle paragraph, arc dash forward shape convex portion structure distribution in end paragraph, and
The dash forward convex portion structure of shape its distribution of horizontal rectangle, square and arc is 1: 3: 3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106147203A (en) * | 2016-08-12 | 2016-11-23 | 浙江山联新材料科技有限公司 | The thin film being made up of inorganic mineral powder |
| CN107791533A (en) * | 2016-09-06 | 2018-03-13 | 量子工程顾问股份有限公司 | The manufacture method of Inorganic synthese paper |
| CN107501683A (en) * | 2017-09-05 | 2017-12-22 | 浙江山联新材料科技有限公司 | A kind of manufacture method of the film manufactured by inorganic mineral powder with the tape casting |
| CN110003574B (en) * | 2019-03-22 | 2022-05-31 | 浙江山联新材料科技有限公司 | Environment-friendly tableware |
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| DE10055793A1 (en) * | 2000-11-10 | 2001-06-28 | Lars Frormann | Three-dimensional pressure injection molding of paper, for molding paper to complex shapes from fibrous cellulosic suspension comprises supplying filled suspension to porous mold |
| CN1651649A (en) * | 2004-02-02 | 2005-08-10 | 王锡臣 | Preparation method of environmental protection synthetic paper |
| CN202225400U (en) * | 2011-03-07 | 2012-05-23 | 广州一道注塑机械有限公司 | High-rotation-speed injection screw rod |
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| DE10055793A1 (en) * | 2000-11-10 | 2001-06-28 | Lars Frormann | Three-dimensional pressure injection molding of paper, for molding paper to complex shapes from fibrous cellulosic suspension comprises supplying filled suspension to porous mold |
| CN1651649A (en) * | 2004-02-02 | 2005-08-10 | 王锡臣 | Preparation method of environmental protection synthetic paper |
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