CN104527189B - A kind of online double-layer composite plastic blowing diaphragm and manufacture method thereof - Google Patents
A kind of online double-layer composite plastic blowing diaphragm and manufacture method thereof Download PDFInfo
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- CN104527189B CN104527189B CN201410796870.4A CN201410796870A CN104527189B CN 104527189 B CN104527189 B CN 104527189B CN 201410796870 A CN201410796870 A CN 201410796870A CN 104527189 B CN104527189 B CN 104527189B
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- film bubble
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/62—Boxes, cartons, cases
Abstract
The invention discloses a kind of online double-layer composite plastic blowing diaphragm, it is softened film bubble internal layer heat seal online by the film bubble of multi-layer co-extruded blowing and forms；The material of described film bubble internal layer is made up of EVA, COC and SEBS mixing；The fusing point of the material of described film bubble outer layer is higher than the Vicat softening point of described film bubble inner layer material.The present invention is by optimizing film bubble inner layer material, while improve seals, inhibit roll banding, improve the thickness evenness of diaphragm, the transparency and the uniformity etc. of heat-sealing, and make the diaphragm prepared have widely to reprocess ability, as through heat seal thicken after again drawn thinning, it is made to have the performance of construct blow-molded and castables concurrently, can be as the packing box back of the body strip of paper used for sealing on package body production line at a high speed.Additionally, the invention also discloses the manufacture method of this online double-layer composite plastic blowing diaphragm.
Description
Technical field
The present invention relates to a kind of diaphragm, be specifically related to a kind of online double-layer composite plastic blowing diaphragm and manufacture method thereof.
Background technology
The production method of conventional plastic thin film includes curtain coating processing technique and blown film processing technique, prepared plastic sheeting
Thickness is typically between 12.5 ~ 300 microns.For thicker thin film or sheet material, curtain coating processing technique and blown film processing technique
The most helpless, need by glue gluing, cause product peel strength low, and also add the complexity of technique.
It is double on inflation film manufacturing machine that Authorization Notice No. is that the Chinese patent of CN101220181B discloses a kind of plastic film sheet material
The method of layer produced with combination sheet material and equipment thereof.Manufactured plastic sheet consist of Low Density Polyethylene 5-65%, ethylene/
The blend of vinyl acetate co-polymer 95-35%；The film bubble containing single microbedding of this patent utilization blow moulding machine blowout, by carrying
It, to increase the viscosity of plastic foil, is flattened at carry-over pinch rolls, is directly compacted be rolled into bundle without hacking cutting by high die head temperature, from
And make two-layer be combined into one layer.The film bubble that this sheet material utilizes is only containing single microbedding, and it is functional that shortage is enriched.But for containing
The film bubble of multiple microbeddings, use the method manufacture sheet material or thick film (here, being referred to as diaphragm) have the disadvantage that first,
For realizing the softening of internal layer film bubble, need improve die head temperature to increase the viscosity of film bubble internal layer, for containing multiple microbeddings
Film bubble, improving die head temperature increases the viscosity of plastic foil and is easily caused the softening of film bubble outer layer and melts, and causes the film bubble flattened to be held
Easily stick on man-like shelf and in carry-over pinch rolls group, roll banding phenomenon occurs；The second, there is roll banding phenomenon meeting and then cause thin film thick
The performance crackings such as degree homogeneity, the transparency, intensity；For many microbeddings barrier film, the generation of roll banding phenomenon also can make material
Barrier property be deteriorated so that it is barriers function is difficult to effectively be ensured, loses by Multi-layer blown film film production thick
Film or the meaning of sheet material.
Therefore develop a kind of produce time can be prevented effectively from roll banding many microbeddings film bubble double-layer plastic blowing diaphragm and
Study its manufacture method to have become those skilled in the art and need to be solved the technical problem that.
Summary of the invention
The plastics that it is an object of the invention to overcome the existing online two-layer compound of film bubble containing single microlayer structures to become blow
Mould that film functionality is few, the defect of easy roll banding, it is provided that one can get final product real on the basis of not attacking material performance, not roll banding
The blowing diaphragm of the online double-layer composite plastic containing many microbeddings now produced, and the manufacturer of such a plastics blow molding diaphragm
Method.
For achieving the above object, the technical scheme is that a kind of online double-layer composite plastic blowing diaphragm of design, institute
State plastics blow molding diaphragm to be formed by the film bubble internal layer heat seal of multi-layer co-extruded blowing；The material of described film bubble internal layer is by EVA, COC
With SEBS mixing composition；The fusing point of the material of described film bubble outer layer is higher than the Vicat softening point of described film bubble inner layer material.
Diaphragm described here includes common plastic foil, also includes plastic sheet, it is not limited to the thickness of plastic film
Degree.
Double-layer composite plastic online with existing film bubble blowing diaphragm, its by multi-layer co-extruded blowing obtain with many microbeddings
Film bubble heat seal form, wherein except limit film bubble outer layer material fusing point higher than described film bubble inner layer material dimension card soften
Outside Dian, more defining the material of film bubble internal layer, wherein in the material of film bubble internal layer, EVA provides of a sufficiently low fusing point, makes
Bilayer can be heat sealing at together；Inventor also finds, can by adding thermoplastic elastomer (TPE) SEBS in the material kind of film bubble internal layer
To increase the physical viscous of film bubble internal layer so that heat seal interface i.e. film bubble internal layer both sides can produce one by the creep of SEBS
The viscosity of body, reduces the requirement to film bubble heating-up temperature, and then can suppress roll banding while improving seals；But
It is flexible that SEBS has viscosity particularly EVA, eventually affects the thickness of diaphragm, makes diaphragm thickness uniformity be deteriorated, inventor
The support strength of film bubble internal layer is improved, it is suppressed that have sticking SEBS and there is bullet by blending cyclic olefine copolymer COC
The EVA of the property impact on bubble thickness alienation, improves the thickness evenness of diaphragm, and then improves the transparency and the heat-sealing of diaphragm
Uniformity.
Here, composition and the percetage by weight thereof of the material of described film bubble internal layer is preferably: EVA10 ~ 30%, COC40 ~ 60%
With SEBS10 ~ 30%.The material of described film bubble outer layer can be the one in PE, PP and PA.
For above-mentioned diaphragm, inventor finds, owing to heat seal rear film thickness is double, it is special that it has good reprocessing
Property.Such as preferred, described plastics blow molding diaphragm after film bubble heat seal, before cooling also through online unidirectional longitudinal stretching and move back
Fire processes, and forms the plastics blow molding diaphragm of unidirectional longitudinal stretching.
To this end, the PE material that preferred described film bubble cladding material is heat sealability.So through online unidirectional longitudinal stretching with
And the thin film that obtains can be as a kind of good back of the body seal material after annealing.
Technical program of the present invention also lies in providing the manufacturer of a kind of above-mentioned online double-layer composite plastic blowing diaphragm
Method, the method comprises the following steps:
S1. the layers of material manufacturing film bubble is melt extruded in an extruder；
S2. duplicature is flattened into by the film bubble that extrusion neck ring mold is multi-layer co-extruded through man-like shelf, simultaneously through preheating apparatus
It is heated in the range of Vicat softening point VST ± 2 DEG C of film bubble internal layer；
S3., after the preheating of film bubble internal layer, the duplicature that film bubble is formed after flattening is advanced through the traction of carry-over pinch rolls group, wherein, and traction
Roller group is made up of the hollow steel roller of heat-resisting rubber rollers and Nei Tongjia deep fat, the storage of the controllable temperature outside hollow steel roller and hollow steel roller
Oil groove forms closed circuit, by the hollow steel roller of carry-over pinch rolls group film bubble is heated to internal layer be softened or melted and heating-up temperature not
Exceed film bubble outer layer fusing point, make the gas that duplicature internal layer is closely affixed, gets rid of in film bubble；
The duplicature being the most closely affixed is walked around heat combined roller group surface with S-shaped, is made film bubble internal layer melt, and adds through heat combined roller group
Heat pressurization makes duplicature be heat sealing at together；
S5. the duplicature after heat seal with in-line by the gap of setting roll group, after setting roll group makes heat seal duplicature
Sizing；
S6. the duplicature cooled roller rolling after cooling after sizing, obtains above-mentioned plastics blow molding diaphragm.
Compared with the manufacture method of existing online double-layer plastic blowing diaphragm, the manufacture method of the present invention improves film bubble
The design of material of internal layer, reduces and softens temperature required to film bubble, thus inhibit roll banding；On the other hand, also by carry-over pinch rolls
The preheating apparatus of group front end makes film bubble preheat and makes the abundant flatulence of heat type of film bubble strut, and makes film further by the carry-over pinch rolls group of heating
In bubble air can abundant flatulence of heat type, effectively to get rid of the air in film bubble, make film bubble both sides can fit more fully, with this
Make film bubble be heat sealing at together simultaneously；The heat combined roller group set up makes film bubble two sidle the S-shaped surface through heat combined roller group, adds pressure
The contact area of flat film bubble and steel rider and time of contact, thus reduce the film bubble time of staying at the highest temperature, improving heat
Close and inhibit while effect film bubble outer layer at the melted softening of heat seal process, roll banding, make film bubble internal layer fill by pressurized, heated
Point melt bonded, need it is to be noted that owing to film bubble internal layer is containing flexible SEBS so that pressurizing melting also rises during heat seal
Arrive the biggest effect, be greatly promoted seals；It is additionally arranged setting roll group simultaneously, makes the film bubble after heat seal with yi word pattern
Shaping through setting roll group, type-approval process makes away the S-shaped sheet material through heat combined roller group surface or thick film curling produce
Stress is fully discharged；The chill roll set up coordinates natural cooling, makes sizing be maintained.Thus on the premise of not roll banding
Realize the online two-layer compound to inflation film, make thickness double.
Traditional preheating apparatus is arranged between man-like shelf and carry-over pinch rolls group, can increase between carry-over pinch rolls group and man-like shelf
Spacing, high to the space requirement of workshop.Preferably technical scheme is that, in described step S2, described preheating apparatus is
It is arranged on the far infrared heater at described man-like shelf.By contrast, if far infrared heater is arranged on man-like shelf
And between carry-over pinch rolls group, film bubble after flattening is carried out Far-infrared Heating, owing in film bubble herein, air is limited, it is impossible to highly effective
Strut film bubble, fold easily occurs during heat seal；And if man-like shelf front end carries out Far-infrared Heating to cylindrical shape film bubble, steam
The pressure produced makes steam seal in man-like shelf, and in causing man-like shelf, air mixes, and makes the film bubble at man-like shelf produce not
Homogeneous deformation, causes later stage sheet thickness uneven, affects the transparency of material, intensity even barrier.Additionally, due to man-like shelf
In place's film bubble, space is gradually reduced, and is arranged on by far infrared heater at man-like shelf, film bubble can be made along man-like shelf clamping direction
Film temperature gradually goes up height, it is achieved gradually heat up preheating.It addition, preheating apparatus is arranged at man-like shelf also the excellent of convenient installation
Point；The fixed position of the auxiliary device such as the film bubble chiller for blow moulding machine will not produce impact.Described preheating apparatus
Heating-up temperature is set to 55～75 DEG C and is advisable.
In order to avoid further at carry-over pinch rolls group occur roll banding, preferred technical scheme is, in described step S3, described in lead
The heating-up temperature of the hollow steel roller of pick-up roll group is 75～90 DEG C.To this end, the rubber rollers heat resisting temperature of described carry-over pinch rolls group is at 100 DEG C
Above.Such as it is good thermostability, the long-term heat resisting temperature fluorine silica gel roller more than 400 DEG C.
In order to avoid there is roll banding at heat combined roller group, reaching optimal seals, it is preferable that in described step S4, institute
Stating heat combined roller group and be sequentially provided with the heat seal steel rider of some progressive solution along material direct of travel, the heating-up temperature of each heat seal steel rider is
80 ~ 130 DEG C, and the heating-up temperature of each heat seal steel rider is incremented by along material direct of travel, the spacing of adjacent heat seal steel rider 0.12 ~
In the range of 2.0mm adjustable.By arranging the heat combined roller group of Multi-stage heating, decrease the film bubble of flattening during heat seal at height
The time of staying under Wen, it is suppressed that roll banding phenomenon；Adjustable by gap, do not only rely on heating, also rely on pressure and realize in film bubble
Layer is the most melted, it is ensured that high heat-sealing strength is to realize real " uniting two into one ".
In order to realize optimal fixed effect, it is preferable that in described step S5, described setting roll group includes upper and lower steel rider,
The holding temperature of steel rider is less than the described heat combined roller group heating-up temperature 5～8 along last steel rider of material direct of travel up and down
℃。
Blown film high transparent, high-barrier can be had concurrently in order to the online double-layer composite plastic after making heat seal is blow molded diaphragm
Advantage that property, interlaminar strength are high and the advantage that casting films elongation at break is low, intensity is high, it is preferable that in described step
Between S5 and step S6, include the most unidirectional longitudinal stretching step of duplicature after the sizing prepare S5 the most successively
S*1Step and annealing process step S*2。
Concrete stretching step is it may be that at described S*1Step, after the sizing that S5 prepares, duplicature is through some pre-hot-rollings
It is preheating to 60～85 DEG C, then stretches when some draw rolls are 75～110 DEG C of temperature, keep the stretching ratio edge of each draw roll
Material direct of travel is incremented by the range of 1.0～2.0 times, and each draw roll is by independent driven by servomotor, adjacent two-by-two
Spacing is adjustable in the range of 5 ~ 25mm.By after preheating, rely on speed and tension force to stretch the most in a heated state, improve
Hot strength simultaneously, maintains the transparency of material.Regulated by draw roll spacing, thus control in thin film drawing process
Cross-direction shrinkage, improves drawing and setting effect.
Concrete annealing steps is it may be that described S*2In step, S*1Prepare duplicature after step to enter through some lehr rollers
Row annealing, the temperature of lehr rollers is 80～100 DEG C, and keep the annealing multiplying power of each lehr rollers along material direct of travel 0.99～
Successively decrease in the range of 0.95 times.By annealing steps so, eliminate stress, contribute to the transparency of material.
Preferably, at described S*1Step, after the sizing that S5 prepares, duplicature preheats through two pre-hot-rollings, by four
Draw roll stretches；At described S*2Step is annealed by two lehr rollers.
Cause effectively stretching in order to avoid draw roll skids, it is further preferred that according to thing in described draw roll
First draw roll and the 4th draw roll of material direct of travel are the anilox roll that surface is formed with the reticulate pattern of 100～200 mesh.
In order to effectively cool down and suppress the cross-direction shrinkage in cooling procedure, it is further preferred that described chill roll group bag
Include two chill rolls.
Additionally, after described annealing steps, before rolling, also include Thickness sensitivity and deburring step.Tape thickness is examined automatically
After examining system detection thickness, feedack can control speed and the tension force of draw roll, it is ensured that the longitudinal thickness of final finished
Uniformity.
Advantages of the present invention and having the beneficial effects that:
Compared with prior art, the present invention online double-layer composite plastic blowing diaphragm optimizes film bubble inner layer material, i.e. exists
In the material of film bubble internal layer, EVA is to provide of a sufficiently low fusing point in interpolation, enables film bubble bilayer to be heat sealing at together；By
The material kind of film bubble internal layer adds SEBS can increase the physical viscous of film bubble internal layer, reduces the requirement to film bubble softening temperature,
Roll banding can be suppressed, and by the physical viscous of SEBS so that heat seal interface i.e. film bubble internal layer both sides can be by SEBS's
Creep produces the viscosity of integration, improves seals；The support strength of film bubble internal layer is improved by blending COC, it is suppressed that
The SEBS particularly EVA impact on bubble thickness alienation, improves the uniform of the thickness evenness of diaphragm, the transparency and heat-sealing
Property.
Owing to being not susceptible to roll banding phenomenon, improve the caliper uniformity of compound rear film, the transparency and intensity；At this
On the basis of, by the online two-layer compound of multi-layer co-extruded thin film bubble with barrier microbedding, it can also be ensured that material after compound
High barrier.
The double plastics blow molding diaphragm of thickness has ability of reprocessing widely.
Such as, on this basis, the unidirectional longitudinal direction then obtained after online unidirectional longitudinal stretching and annealing is drawn
The plastics blow molding diaphragm stretched, has had the high advantage of blown film high transparent, high barrier, interlaminar strength and casting films concurrently
The advantage that elongation at break is low, intensity is high, overcomes blown film thickness is low, be difficult to biaxial tension reprocessing shortcoming and curtain coating
Film is combined by adhesive, has the shortcoming of combined strength bination between low layer.
This thicken through heat seal, redraw thinning diaphragm tool and have been widely used and promotion advantage greatly, to make
For illustrating as a example by packing box back of the body strip of paper used for sealing: existing packing box back of the body strip of paper used for sealing many employings coextrusion blow film, its transparency is high, barrier
Can be high, interlaminar strength is high, but coextrusion blow film-strength is low, elongation at break is high, on package body production line at a high speed,
Due to the difference of linear velocity, coextrusion blow film is intermittently stretched with package body main body compound tense, can cause carrying on the back strip of paper used for sealing material
Material inequality homogenizes, and then causes back of the body envelope poor effect, therefore, it is difficult to adapt to high-speed packaging production line；Even if blown film is carried out from
Line drawing, but the thickness of blown film is little, elongation at break big, can reduce the thickness drawing blown film after one's death further, be allowed to nothing
Method is suitable for as the back of the body seal material with packing box heat-seal；By contrast, by being cast compound thin film (such as PE/ glue/PET/
Glue/PE), its thickness can be the highest, and interlayer is through biaxial tension, and intensity is high, elongation at break is low, is more suitable at a high speed
Package body production line, but be combined by adhesive between each layer of cast composite film, therefore interlayer combined strength bination is low, as back of the body envelope
Bar easily produces splitting.By contrast, this thicken through heat seal, redrawing thinning diaphragm, not only to have blown film high
The advantage that the transparency, high barrier, interlaminar strength are high, and can be stretched as casting films and have high intensity and
Low elongation at break, can carry on the back strip of paper used for sealing as the packing box on the package body production line of applicable high speed.
This manufacture method makes blown film thickness double, and thick film or sheet material can be one-body molded, saves the energy, it also avoid
Glue is combined the Cost Problems brought and is combined the problems such as the best.
Accompanying drawing explanation
Fig. 1 is the structural representation of plastics blow molding thin film online two-layer compound production line in embodiment 1；
Fig. 2 is the structural representation of plastics blow molding thin film online two-layer compound production line in embodiment 2；
Fig. 3 is the cooperation schematic diagram of first, second, third steel rider in heat combined roller group in Fig. 2；
Fig. 4 is the structural representation of plastics blow molding thin film online two-layer compound production line in embodiment 3.
In figure: 1, film bubble；2, man-like shelf；3, far infrared heater；4, oil storage tank；5, hollow steel roller；6, rubber rollers；7、
Heat combined roller group；8, setting roll group；9, chill roll group；10, wind-up roll；11, trimming roller；12, tooth is carved；13, groove；14, pre-hot-rolling；
15, draw roll；16, lehr rollers；71, the first steel rider；72, the second steel rider；73, the 3rd steel rider；74, the 4th steel rider；151, first
Draw roll；154, the 4th draw roll.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, the detailed description of the invention of the present invention is further described.Following example are only
For technical scheme is clearly described, and can not limit the scope of the invention with this.
Embodiment 1
The present invention is a kind of online double-layer composite plastic blowing diaphragm.This plastics blow molding diaphragm is by multi-layer co-extruded blowing
Film bubble 1 internal layer heat seal forms；Composition and the percetage by weight thereof of the material of film bubble 1 internal layer be: EVA10 ~ 30%, COC40 ~ 60% He
SEBS10~30%；The fusing point of the material of film bubble 1 outer layer is higher than the Vicat softening point of film bubble 1 inner layer material, in PE, PP and PA
A kind of.
The manufacture method of this plastics blow molding diaphragm comprises the following steps:
S1. the layers of material manufacturing film bubble 1 is melt extruded in an extruder；
S2. duplicature is flattened into by the film bubble 1 that extrusion neck ring mold is multi-layer co-extruded through man-like shelf 2, simultaneously through man-like shelf 2
The film bubble that plays at place preheats the far infrared heater 3 of effect and is heated to 55～75 DEG C, reaches the Vicat softening point of film bubble 1 internal layer
Near；In the range of being preferably the 1/4～1/3 of the close carry-over pinch rolls group that far infrared heater 3 is arranged on man-like shelf 2.
S3., after the preheating of film bubble 1 internal layer, the duplicature that film bubble 1 is formed after flattening is advanced through the traction of carry-over pinch rolls group, wherein, leads
Pick-up roll group is made up of the hollow steel roller 5 of heat-resisting rubber rollers 6 and Nei Tongjia deep fat, hollow steel roller 5 with hollow steel roller 5 outside controlled
The oil storage tank 4 of temperature forms closed circuit, by the hollow steel roller 5 of carry-over pinch rolls group, film bubble 1 is heated to 75～90 DEG C, makes film bubble 1
Internal layer is to being softened or melted but less than film bubble 1 outer layer fusing point, so that the gas that duplicature internal layer is closely affixed, gets rid of in film bubble
Body.
The duplicature being the most closely affixed is walked around heat combined roller group 7 surface with S-shaped, is made film bubble internal layer melt, through heat combined roller group 7
Heating pressurization makes duplicature be heat sealing at together.As it is shown in figure 1, heat combined roller group 7 is sequentially provided with four classifications along material direct of travel
The heat seal steel rider of heating, is followed successively by the first steel rider the 71, second steel rider the 72, the 3rd steel rider 73 and the 4th steel rider along material direct of travel
74, the heating-up temperature of each steel rider 71-74 is 80 ~ 130 DEG C, and is incremented by successively along material direct of travel, between each heat combined roller away from
From adjustable in the range of 0.12 ~ 2.0mm, make film bubble internal layer the most melted in pressurization and the common effect heated, it is ensured that high heat
" uniting two into one " that sealing strength is real to realize film bubble both sides.Additionally, for film bubble 1 heat seal effectively flattened, heat combined roller group 7
Arrange preferably adjacent to carry-over pinch rolls group.
S5. the duplicature after heat seal with in-line by the gap of setting roll group 8, after setting roll group 8 makes heat seal double-deck
Film is shaped；The stress that type-approval process makes away the S-shaped curl of sheet through heat combined roller group 7 surface produce fully is discharged.Sizing
Roller group 8 includes upper and lower steel rider；The holding temperature of steel rider is less than the heating-up temperature 5～8 of the 4th steel rider 74 of heat combined roller group 7 up and down
℃.Additionally, in order to the film bubble 1 after making heat seal is effectively shaped and cools down, setting roll group 8 is arranged preferably adjacent to heat combined roller group 7.
S6. the duplicature cooled roller group 9 after sizing cools down, and makes sizing be maintained；Receive through wind-up roll 10 after cooling
Volume, obtains above-mentioned plastics blow molding diaphragm.
Fig. 1 provides the production line schematic diagram that this manufacture method uses.
Embodiment 2
On the basis of embodiment 1, as in figure 2 it is shown, after chill roll 9 cools down, before wind-up roll 10 rolling, also by
Trimming roller 11 cuts sheet edge after cooling, and the performance making diaphragm is the most homogeneous.
Additionally, during heat seal, it is also possible to carry out the aerofluxus of film bubble 1 simultaneously, such as at least one of heat combined roller group 7
The both sides of heat seal steel rider are provided with the shedding mechanism forming air vent for film bubble 1 edge after becoming compressed.As it is shown on figure 3, tapping machine
Structure is the tooth 12 at cross section is triangle quarter of the both sides being arranged on the second steel rider 72.Meanwhile, the first steel rider 71 and the 3rd
The quarter at corresponding second steel rider 72 of steel rider 73 is provided with at tooth 12 and carves the groove 13 that tooth 12 coordinates.It is both real that tooth 12 at quarter is so set
Show opening venting, material will not be made again to deform.
Embodiment 3
The present invention is a kind of online double-layer composite plastic blowing diaphragm.Difference with embodiment 1 is, by multi-layer co-extruded
Also through the most unidirectional longitudinal stretching and annealing after the film bubble 1 online internal layer heat seal sizing that blowing obtains, before cooling,
Obtain the plastics blow molding diaphragm of the unidirectional longitudinal stretching that heat seal thickness is double, stretched thickness halves.Concrete longitudinal stretching and
Annealing process step is:
S*1. the longitudinal stretching that duplicature after sizing is the most unidirectional: specifically, the duplicature after sizing
It is preheating to 60～85 DEG C through two pre-hot-rollings 14, then stretches when four draw rolls 15 are 75～110 DEG C of temperature, keep each
The stretching ratio of draw roll 15 is incremented by the range of 1.0～2.0 times along material direct of travel, i.e. respectively stretches along material direct of travel
The linear velocity of roller 15 promotes in the range of the linear velocity 1.0 of the hollow steel roller 5 of carry-over pinch rolls group～2.0 times step by step；It addition, respectively draw
Stretching roller 15 by independent driven by servomotor, adjacent spacing two-by-two is adjustable in the range of 5 ~ 25mm, to control thin film stretching
During cross-direction shrinkage, improve drawing and setting effect.
Wherein, cause effectively stretching, along the first draw roll 151 He of material direct of travel in order to avoid stretching skidding
4th draw roll 154 is formed with the anilox roll of the reticulate pattern of 100～200 mesh for surface.If otherwise causing skidding, it is not only in that difficulty
Thinning to be evenly stretched, its harm is more to cause the traction of front end and heat seal effectively to carry out, and then causes shutting down frequency
Numerous appearance.
S*2. the annealed process of duplicature after longitudinal stretching: specifically, the duplicature after stretching moves back through two
Fire roller 16 is annealed, and the temperature of lehr rollers 16 is 80～100 DEG C, and keeps the annealing multiplying power of each lehr rollers along material traveling side
Successively decrease in the range of 0.99～0.95 times, i.e. along the linear velocity of each lehr rollers of material direct of travel 16 at last draw roll
Successively decrease step by step in the range of 0.99～0.97 times of 15 linear velocities.
After anneal, Thickness sensitivity and deburring step also can be increased, particularly as follows:
S*3. Thickness sensitivity: after tape thickness automatic checkout system (not shown) is to the thin film testing thickness after annealing, feedback
Information can control speed and the tension force of draw roll, it is ensured that the uniformity of the longitudinal thickness of final finished；
S*4. deburring step: cutting sheet edge after cooling by trimming roller 11, the performance making diaphragm is the most homogeneous.
It addition, in this embodiment, best chill roll group 9 is made up of plural chill roll, with realize sufficiently cool and
Effectively shape after keeping stretching.
The diaphragm that embodiment 3 obtains had concurrently the high advantage of blown film high transparent, high barrier, interlaminar strength with
And the advantage that casting films elongation at break is low, intensity is high.Wherein, manufacturing film bubble thing, selecting film bubble cladding material is heat sealability
PE material.The thin film so obtained after film bubble heat seal, unidirectional longitudinal stretching and annealing can serve as one
Planting good back of the body seal material, its transparency is high, barrier property is high, and interlaminar strength is high, and intensity is high, elongation at break is low,
Adapt on package body production line at a high speed
Fig. 4 provides the production line schematic diagram that this manufacture method uses.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvements and modifications, these improvements and modifications
Also should be regarded as protection scope of the present invention.
Claims (7)
1. the manufacture method of an online double-layer composite plastic blowing diaphragm, it is characterised in that comprise the following steps:
S1. the layers of material manufacturing film bubble is melt extruded in an extruder；
S2. flattened into duplicature by the film bubble that extrusion neck ring mold is multi-layer co-extruded through man-like shelf, heat through preheating apparatus simultaneously
To Vicat softening point VST ± 2 DEG C of film bubble internal layer；
S3., after the preheating of film bubble internal layer, the duplicature that film bubble is formed after flattening is advanced through the traction of carry-over pinch rolls group, wherein, and carry-over pinch rolls group
It is made up of the hollow steel roller of heat-resisting rubber rollers and Nei Tongjia deep fat, the oil storage tank of the controllable temperature outside hollow steel roller and hollow steel roller
Form closed circuit, by the hollow steel roller of carry-over pinch rolls group, film bubble is heated to internal layer and is softened or melted and less than film bubble outer layer
Fusing point, makes the gas that duplicature internal layer is closely affixed, gets rid of in film bubble；
The duplicature being the most closely affixed is walked around heat combined roller group surface with S-shaped, is made film bubble internal layer melt, and adds through heat combined roller group
Pressure makes duplicature be heat sealing at together；
S5. the duplicature after heat seal with in-line by the gap of setting roll group, after setting roll group makes heat seal, duplicature is fixed
Type；
S6. the duplicature cooled roller group rolling after cooling after sizing, obtains described plastics blow molding diaphragm；
Plastics blow molding diaphragm is formed by the film bubble internal layer heat seal of multi-layer co-extruded blowing；The material of described film bubble internal layer by EVA,
COC and SEBS mixes composition；The fusing point of the material of film bubble outer layer is higher than the Vicat softening point of described film bubble inner layer material.
2. manufacture method as claimed in claim 1, it is characterised in that in described step S2, described preheating apparatus is for arranging
Far infrared heater at described man-like shelf, heating-up temperature is 55～75 DEG C；In described step S3, described carry-over pinch rolls group
The heating-up temperature of hollow steel roller is 75～90 DEG C.
3. manufacture method as claimed in claim 1, it is characterised in that in described step S4, described heat combined roller group is along material row
Entering direction and be sequentially provided with the heat seal steel rider of some progressive solution, the heating-up temperature of each heat seal steel rider is 80 ~ 130 DEG C, and each heat seal
The heating-up temperature of steel rider is incremented by along material direct of travel, and the spacing of adjacent heat seal steel rider is adjustable in the range of 0.12 ~ 2.0mm；
In described step S5, described setting roll group includes upper and lower steel rider, and the holding temperature of upper and lower steel rider is less than described heat combined roller group along thing
The heating-up temperature 5 of last heat seal steel rider of material direct of travel～8 DEG C.
4. the manufacture method as described in claim 1 or 2 or 3, it is characterised in that between described step S5 and step S6, also
Include the most unidirectional longitudinal stretching step S* of duplicature after the sizing prepare S5 successively1Step and annealing treatment
Reason step S*2。
5. manufacture method as claimed in claim 4, it is characterised in that at described S*1Step, duplicature after the sizing that S5 prepares
It is preheating to 60～85 DEG C through some pre-hot-rollings, then stretches when some draw rolls are 75～110 DEG C of temperature, keep each stretching
The stretching ratio of roller is incremented by the range of 1.0～2.0 times along material direct of travel, and each draw roll is by independent servomotor
Driving, adjacent spacing two-by-two is adjustable in the range of 5 ~ 25mm；Described S*2In step, S*1If preparing duplicature after step to pass through
Dry lehr rollers is annealed, and the temperature of lehr rollers is 80～100 DEG C, and keeps the annealing multiplying power of each lehr rollers along material traveling side
Successively decrease in the range of 0.99～0.95 times.
6. manufacture method as claimed in claim 5, it is characterised in that at described S*1Step, duplicature after the sizing that S5 prepares
Preheat through two pre-hot-rollings, stretched by four draw rolls, annealed by two lehr rollers；Wherein, according to material traveling side
To the first draw roll and the 4th draw roll be the anilox roll that surface is formed with 100～200 mesh reticulate patterns；In described step S6, institute
State chill roll group and include two chill rolls.
7. manufacture method as claimed in claim 4, it is characterised in that after described annealing steps, before rolling, also include thickness
Degree detection and deburring step.
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| CN201410796870.4A CN104527189B (en) | 2014-12-22 | 2014-12-22 | A kind of online double-layer composite plastic blowing diaphragm and manufacture method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105109074A (en) * | 2015-08-25 | 2015-12-02 | 桐城市福润包装材料有限公司 | Technology for preparing double-layer PE packaging film |
| CN108819197A (en) * | 2016-06-29 | 2018-11-16 | 浙江汇锋薄膜科技有限公司 | Extrusion mechanism on inflation film manufacturing machine |
| CN107521193A (en) * | 2017-08-31 | 2017-12-29 | 烟台丰福莱薄膜科技有限公司 | A kind of enhanced long-acting gas-phase antirusting film and its process units |
| CN107471621B (en) * | 2017-09-13 | 2019-09-03 | 昆山市张浦彩印厂 | The preparation method of multi-layer co-extrusion two-way stretching laminated film |
| EP3873736A4 (en) * | 2018-11-01 | 2022-06-22 | MuCell Extrusion LLC | Foamed sheet comprising tpe and the products resulting therefrom and the process of making the same |
| CN109591310B (en) * | 2018-11-29 | 2021-05-07 | 烟台丰福莱薄膜科技有限公司 | Preparation method of ultrathin super-mirror-surface polypropylene aluminized substrate film |
| US20200172715A1 (en) | 2018-11-30 | 2020-06-04 | Exxonmobil Chemical Patents Inc. | Blends of Cyclic Olefin Copolymers and Films Prepared Therefrom |
| EP3733410A1 (en) * | 2019-05-02 | 2020-11-04 | Henkel AG & Co. KGaA | Process for bonding flexible films and device for carrying out the same |
| CN111590857A (en) * | 2020-05-30 | 2020-08-28 | 侯哲宇 | Production process of preservative film |
| CN114516209B (en) * | 2022-02-18 | 2024-03-08 | 广东雄塑科技集团股份有限公司 | Composite sheet for sticking roller and Kraft pipe production process using composite sheet |
| CN116160745B (en) * | 2023-04-23 | 2023-07-25 | 广东德冠薄膜新材料股份有限公司 | Polypropylene film, preparation method thereof and thermal composite sheet |
| CN117621423A (en) * | 2023-11-07 | 2024-03-01 | 东莞市首誉电子材料有限公司 | Preparation control method, device, equipment and medium of screen optical film |
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Effective date of registration: 20190110 Address after: 214400 South Outer Ring Road 858, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangyin Baobo Packing Co., Ltd. Address before: 214400 Zhencheng Road, Jiangyin City, Wuxi City, Jiangsu Province, 1999 Patentee before: JIANGSU SHENLONG PACKING MATERIALS CO., LTD. |
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