CN105599261A - Manufacturing method of middle-sized ultrathin polyethylene film, film blowing machine and polyethylene film - Google Patents
Manufacturing method of middle-sized ultrathin polyethylene film, film blowing machine and polyethylene film Download PDFInfo
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- CN105599261A CN105599261A CN201610013861.2A CN201610013861A CN105599261A CN 105599261 A CN105599261 A CN 105599261A CN 201610013861 A CN201610013861 A CN 201610013861A CN 105599261 A CN105599261 A CN 105599261A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/69—Filters or screens for the moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0625—LLDPE, i.e. linear low density polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
Abstract
The invention discloses a manufacturing method of a middle-sized ultrathin polyethylene film. A polyethylene resin material is mixed to be uniform and fed into an extruder for extrusion, filtration is performed through a three-way joint so that impurities can be removed to be discharged out of a mold head, and cooling and huffing are performed to obtain film bubbles. The film bubbles are folded to be in a plane shape through an inverted-V-shaped board; traction is performed through a traction device, and winding is performed through a film winding roller. The temperature of a first region of the extruder is 170-180 DEG C, the temperature of a second region of the extruder is 180-190 DEG C, and the temperature of a third region of the extruder is 180-200 DEG C. The temperature of the three-way joint is 195-220 DEG C, and the temperature of the mold head is 200-240 DEG C. The diameter of a filter net in the three-way joint is 90 mm, and the mesh size of the filter net in the three-way joint is 90-100. The diameter of a core rod of the mold head is 46 mm, and the length of the core rod of the mold head is 1250 mm. The invention further discloses a film blowing machine of the middle-sized ultrathin polyethylene film and the middle-sized ultrathin polyethylene film. The middle-sized ultrathin polyethylene film has the advantages of being good in strength, low in machining end breakage rate, easy to open and low in price.
Description
Technical field
The present invention relates to polyethylene film technical field, relate in particular to middle size super model polyethylene film preparation method,Inflation film manufacturing machine, ultra-thin polyethylene film.
Background technology
PE film, i.e. polyethylene film, refers to the film by PE film production. PE film has moisture resistance,Poisture-penetrability is little. Polyethylene film (PE) is different according to manufacture method and control device, can produce low-density,The product of the different performances such as middle density, highdensity polyethylene and crosslinked polyethylene.
PE film comprises low density polyethylene (LDPE), medium density polyethylene, high density polyethylene (HDPE).
Wherein, its density of low density polyethylene (LDPE) is about 0.92g/cm3 left and right. Low-density polyethylene film transparentDegree is good with heat sealability, energy waterproof, protection against the tide; Tensile strength is low, and tensile elongation is large, easily sends out wrinkle, 0.03mmFollowing film, tension force control should be little, and tension force is constant everywhere, more yielding while being particularly heated,Cause chromatography difficulty. Therefore, while being dried, film surface temperature is not too high (550。In C). By film forming workThe difference of skill, can be divided into inflation film (IPE), salivation film (CPE), low foamed thin sheet etc. several. IPE is thinTensile strength and the opening of film are better than CPE film, adopt positive printing, can make food bag, garment bag etc.;CPE film thickness is even, and surface gloss, transparency and heat sealability are better than PE, can positive back face printing, butProduction cost is high. CPE film is mainly as the internal layer of complex pocket and the packaging of cosmetics, pickles and cake;Low foamed thin sheet good decorative property, quality is abundant, is difficult for stretcher strain, adopts positive printing, as ew Year pictures,Trade mark and hand carrying bag etc.
Medium density polyethylene, its density is poly-between high density and low-density about 0.93～0.94g/cm3 performanceBetween ethene.
Its density of high density polyethylene (HDPE) is at 0.94～0.965g/cm3. The heat resistance of density polyethylene film with high, machineTool strength ratio low-density polyethylene film is good, and tensile elongation is little, film thickness generally more than 0.03mm,But poor transparency. Adopt positive printing, mainly as plastic bag, refuse bag and inner lining bag etc.
The production technology of polythene film bag comprises the steps: that polyvinyl resin master batch passes through blown film by (1)Mechanism film; (2) use winder winding around and cut out the length of setting by cutting out film machine; (3) use heat sealMachine carries out heat seal; (4) cut out base heat seal, both sides sealing, open-topped polythene film bag.
At present, the polythene film bag of producing on market, its thickness is many in the scope of 0.01mm～0.03mm.Due to the linear relationship between the thickness existence of film strength, price and film, produce by prior artThickness is lower than the polythene film bag of 0.01mm, and its brute force is poor, processing end breakage rate is high and be difficult for opening.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide that intensity is good, processing end breakage rate low, easy opening, valencyPreparation method, inflation film manufacturing machine, the ultra-thin polyethylene film of the middle size super model polyethylene film that lattice are cheap.
The present invention adopts following technological means to solve the problems of the technologies described above: the preparation of the ultra-thin polyethylene film of middle sizeMethod, feeds to extruder and extrudes after polyvinyl resin material is mixed, and obtains molten mass; By meltingBody is crossed and is filtered to remove impurity from die head out after threeway, through cooling, after inflation, obtains film bubble; Passing through peopleLetter stencil is folded into film bubble plane; After drawing by draw-gear again, reeled by volume film roller; Described extrudingThe temperature in Ji Yi district is that 170 DEG C～180 DEG C, the temperature in 2nd district are that 180 DEG C～190 DEG C, the temperature in 3rd district are 180 DEG C～200 DEG C; The temperature of described threeway is 195 DEG C～220 DEG C, and the temperature of described die head is 200 DEG C～240 DEG C;
In described threeway, the diameter of screen pack is 90mm, 90 order～100 orders; The diameter of plug on described die headFor 46mm, length are 1250mm.
Preferably: polythene PE HD5301AA, the 20wt%'s that described polyvinyl resin material is 38wt% is poly-The PEHD9455F of ethene PELA5000S, 38wt%1, 4wt% PELL0220KJ.
Preferably: described screen pack is at least three layers.
Preferably: polythene PE HD5301AA, the 45wt%'s that described polyvinyl resin material is 50wt%The PELL0220KJ of feed back, 5wt%.
Preferably: described polyvinyl resin material is polythene PE HD5301AA.
Preferably: described screen pack is at least four layers.
Preferably: described screen pack is metal filter screen.
Also inflation film manufacturing machine openly of the present invention, comprise extruder, threeway, die head, vane, plug, surely steep frame,Collapser, the first draw-gear, the second draw-gear, volume film roller;
Described die head is arranged on the extruding end of described extruder by described threeway, described in described vane is arranged onOn die head, the middle part of described die head is coaxially installed with described plug, and described plug top is provided with described steady bubbleFrame, surely steeps on frame and is provided with described collapser, and the top of described collapser is provided with described the first draw-gear,Described the second draw-gear is in order to the extremely described volume film roller of packaging film feeding after described the first draw-gear is drawnOn;
In described threeway, the diameter of screen pack is 90mm, 90 order～100 orders; Described screen pack is at least three layers;On described die head, the diameter of plug is that 46mm, length are 1250mm.
Preferably: described screen pack is metal filter screen.
The ultra-thin polyethylene film of middle size that the present invention also openly uses above-mentioned preparation method to prepare, described middle chiVery little its width of ultra-thin polyethylene film is that 80cm～110cm, thickness are 0.0025mm～0.006mm.
The invention has the advantages that: by the middle size polyethylene of inflation film manufacturing machine of the present invention and film blowing method equipment thereofFilm, its thickness can be controlled within the scope of 0.0025mm～0.006mm, more than intensity can reach 3.2Mpa,Can be used as gum sprayed cotton outer bag. Relatively existing polyethylene film, polyethylene film of the present invention has thinnerThickness, in meeting packaging bag desirable strength, saved cost.
Further, in raw material, add PELL0220KJ, reduced processing broken end, weakened film static existingResemble.
Further, adopt the part of feed back as raw material, reduced production cost.
Further, adopt pure PEHD5301AA to carry out blown film, saved batch mixing link.
Brief description of the drawings
Fig. 1 is the structural representation of the ultra-thin polyethylene film inflation film manufacturing machine of size in the present invention.
Detailed description of the invention
In the present invention, specifically to refer to width be that 80cm～110cm, thickness are to the ultra-thin polyethylene film of sizeThe polyethylene film of 0.0025mm～0.006mm. Be applied to gum sprayed cotton outer bag.
Embodiment of the present invention inflation film manufacturing machine used is to be manufactured by Shantou, Guangdong ocean Xing Fu plastics machinery Co., Ltd, model is SJ55MGF1200.
PEHD5301AA is produced by Shanghai Sai Ke petrochemical industry Co., Ltd.
PELA5000S Sinopec Yangzi Petrochemical Co produces.
PEHD9455F1By PetroChina Company Ltd., the life of Sichuan petrochemical industry Co., LtdProduce.
PELL0220KJ is produced by Shanghai Sai Ke petrochemical industry Co., Ltd.
The present invention adopts GB/T1040.1-2006 to record each embodiment sample, and (clamping spacing 50mm, film are long150mm, the wide 10mm of film) longitudinal stretching, transverse tensile strength.
Embodiment 1
The polythene PE HD5301AA that is 38wt% by polyvinyl resin material, the polyethylene of 20wt%The PEHD9455F of PELA5000S, 38wt%1, 4wt% PELL0220KJ mix rear feeding extremelyIn extruder, extrude, obtain molten mass. Molten mass is crossed and filtered to remove impurity from die head out, warp after threewayCooling, after inflation, obtain film bubble. By collapser, film bubble is folded into planely, then passes through draw-gearAfter traction, reeled by volume film roller.
Wherein, the temperature in extruder one district is that 175 DEG C, the temperature in 2nd district are that 180 DEG C, the temperature in 3rd district are180 DEG C. The temperature of threeway is 195 DEG C, and the temperature of die head is 200 DEG C.
In threeway, the diameter of screen pack is 90mm, 90 orders, and in threeway, the number of plies of screen pack is three layers.
By setting multiple filtration net, improve filter effect.
On die head, the diameter of plug is that 46mm, length are 1250mm.
Width prepared by the method for the present embodiment is that the polyethylene film that 80cm, thickness are 0.0025mm is cut intoThe sample of clamping spacing 50mm, the wide 10mm of film, records its longitudinal stretching by GB/T1040.1-2006 strongDegree is 3.31Mpa, and its transverse tensile strength is 3.23Mpa.
Because the present embodiment has added PELL0220KJ in raw material, reduce processing broken end, weaken film staticPhenomenon.
Embodiment 2
The polythene PE HD5301AA that is 38wt% by polyvinyl resin material, the polyethylene of 20wt%The PEHD9455F of PELA5000S, 38wt%1, 4wt% PELL0220KJ mix rear feeding extremelyIn extruder, extrude, obtain molten mass. Molten mass is crossed and filtered to remove impurity from die head out, warp after threewayCooling, after inflation, obtain film bubble. By collapser, film bubble is folded into planely, then passes through draw-gearAfter traction, reeled by volume film roller.
Wherein, the temperature in extruder one district is that 178 DEG C, the temperature in 2nd district are that 187 DEG C, the temperature in 3rd district are192 DEG C. The temperature of threeway is 203 DEG C, and the temperature of die head is 215 DEG C.
In threeway, the diameter of screen pack is 90mm, 95 orders, and in threeway, the number of plies of screen pack is three layers.
On die head, the diameter of plug is that 46mm, length are 1250mm.
Width prepared by the method for the present embodiment is that the polyethylene film that 100cm, thickness are 0.004mm is cut intoSample, recording its longitudinal tensile strength by GB/T1040.1-2006 is 3.90Mpa, its transverse tensile strengthFor 3.84Mpa.
Embodiment 3
By the feed back of polythene PE HD5301AA, the 45wt% of 50wt%, the PELL0220KJ of 5wt%After mixing, feed to extruder and extrude, obtain molten mass. Molten mass is excessively filtered to remove assorted after threewayMatter from die head out, through cooling, after inflation, obtains film bubble. By collapser, film bubble is being folded into planeShape. After drawing by draw-gear again, reeled by volume film roller.
The feed back that the present invention adopts is by the product of leftover bits and pieces, callable vinyon granulation.
Wherein, the temperature in extruder one district is that 178 DEG C, the temperature in 2nd district are that 187 DEG C, the temperature in 3rd district are192 DEG C. The temperature of threeway is 203 DEG C, and the temperature of die head is 215 DEG C.
In threeway, the diameter of screen pack is 90mm, 95 orders, and in threeway, the number of plies of screen pack is four layers.
On die head, the diameter of plug is that 46mm, length are 1250mm.
Width prepared by the method for the present embodiment is that the polyethylene film that 100cm, thickness are 0.004mm is cut intoSample, recording its longitudinal tensile strength by GB/T1040.1-2006 is 3.63Mpa, its transverse tensile strengthFor 3.54Mpa.
Compare embodiment 2, this enforcement adopts the part of feed back as raw material, has reduced production cost, stillThe brute force of the sample that relative embodiment 1 raw material of brute force of sample is produced declines to some extent.
Embodiment 4
Polythene PE HD5301AA is fed to extruder and extruded, obtain molten mass. By molten mass through threeAfter logical, cross and filter to remove impurity from die head out, through cooling, after inflation, obtain film bubble. To by collapserFilm bubble is folded into plane, then after drawing by draw-gear, is reeled by volume film roller.
Wherein, the temperature in extruder one district is that 178 DEG C, the temperature in 2nd district are that 187 DEG C, the temperature in 3rd district are192 DEG C. The temperature of threeway is 203 DEG C, and the temperature of die head is 215 DEG C.
In threeway, the diameter of screen pack is 90mm, 95 orders, and in threeway, the number of plies of screen pack is four layers.
On die head, the diameter of plug is that 46mm, length are 1250mm.
Width prepared by the method for the present embodiment is that the polyethylene film that 100cm, thickness are 0.004mm is cut intoSample, recording its longitudinal tensile strength by GB/T1040.1-2006 is 3.78Mpa, its transverse tensile strengthFor 3.69Mpa.
Embodiment is compared to embodiment 2, embodiment 3, has adopted pure PEHD5301AA to carry out blown film,Saved batch mixing link, brute force still can.
Embodiment 5
The polythene PE HD5301AA that is 38wt% by polyvinyl resin material, the polyethylene of 20wt%The PEHD9455F of PELA5000S, 38wt%1, 4wt% PELL0220KJ mix rear feeding extremelyIn extruder, extrude, obtain molten mass. Molten mass is crossed and filtered to remove impurity from die head out, warp after threewayCooling, after inflation, obtain film bubble. By collapser, film bubble is being folded into planely, then is filling by tractionPut after traction, reeled by volume film roller.
Wherein, the temperature in extruder one district is that 180 DEG C, the temperature in 2nd district are that 190 DEG C, the temperature in 3rd district are200 DEG C. The temperature of threeway is 220 DEG C, and the temperature of die head is 240 DEG C.
In threeway, the diameter of screen pack is 90mm, 100 orders, and in threeway, the number of plies of screen pack is four layers.
On die head, the diameter of plug is that 46mm, length are 1250mm.
Width prepared by the method for the present embodiment is that the polyethylene film that 70cm, thickness are 0.006mm is cut into examinationSample, recording its longitudinal tensile strength by GB/T1040.1-2006 is 4.21Mpa, its transverse tensile strength is4.17Mpa。
The each district of the present invention temperature range is to be that 80cm～110cm, thickness are for producing widthThe polyethylene film of 0.0025mm～0.006mm is set, its intensity of the polyethylene film of preparing in this temperature rangeHigher, glossiness and transparency are good. Temperature is high, can affect the decomposition of raw material, the film embrittlement of producing,Intensity declines obviously. Temperature is low, plastifies unstable surface and film glossiness, poor transparency, and impact is strong simultaneouslyDegree.
It is that 80cm～110cm, thickness are that the plug of specification of the present invention is applicable to produce widthThe polyethylene film of 0.0025mm～0.006mm. The plug of this specification improves good constancy, the stabilising membrane of cylinder filmThe effect of bubble. In addition, its intensity of polyethylene film that adopts plug of the present invention to prepare is better. If plug is straightFootpath is too small, and I can cause film bubble shakiness, and the diameter of plug is excessive, can affect film forming pulling force, easily fracture.If the length of plug is too short, can reduce film forming pulling force; And the length of plug is long, can make installing space increaseGreatly, not easy to operate.
In threeway of the present invention, the specification of screen pack is to be also that 80cm～110cm, thickness are for producing widthThe special setting of polyethylene film of 0.0025mm～0.006mm. Diameter or aperture are excessive, and discharging speed is fast, mistakeFilter insufficiently, film is thicker, does not reach ultra-thin requirement. Diameter or aperture are too small, and discharging speed is slow, shadowRing production efficiency.
The screen pack that the present invention uses is preferably metal filter screen, also can use other resistance to height of prior artTemperature screen pack.
As shown in Figure 1, the ultra-thin polyethylene film inflation film manufacturing machine of size during the present invention is also open, comprise extruder body 1,Threeway 2, die head 3, vane 4, plug 5, surely steep frame 6, collapser 7, the first draw-gear 8, secondDraw-gear 9, volume film roller 10, motor 12, reductor 13, air blast 14.
Motor 12 is connected with one end of reductor 13, one of the other end of reductor 13 and extruder body 1End is connected, and die head 13 is arranged on the other end of extruder body 1 by threeway 2, and a side of die head 13 is establishedBe equipped with valve 15. In threeway 2, be provided with screen pack. Vane 4 is arranged on die head 3, the middle part of die head 3Be coaxially installed with plug 5, plug 5 tops are provided with steady bubble frame 6, and surely steep and on frame 6, be provided with collapser 7,The top of collapser 7 is provided with the first draw-gear 8, the second draw-gears 9 in order to by the first draw-gear 8Packaging film feeding after traction is to rolling up on film roller 10.
Between the first draw-gear 8, the second draw-gear 9, the second draw-gear 9, volume film roller 10 itBetween be also provided with some with deflector rolls 11.
In threeway 2, the diameter of screen pack is 90mm, 90 order～100 orders. Screen pack is at least three layers. Die headOn 3, the diameter of plug 5 is that 46mm, length are 1250mm.
The improvement of the present invention to screen pack, plug 5 is to be all for satisfied preparation 80cm～110cm, thicknessThe polyethylene film of 0.0025mm～0.006mm is formulated.
The foregoing is only the preferred embodiment of the invention, not in order to limit the invention,Any amendment of doing within all spirit in the invention and principle, be equal to and replace and improvement etc., all shouldWithin being included in the protection domain of the invention.
Claims (10)
1. the preparation method of the ultra-thin polyethylene film of size in, feeds to extruder and extrudes after polyvinyl resin material is mixed, and obtains molten mass; Molten mass is crossed and filtered to remove impurity from die head out after threeway, through cooling, after inflation, obtain film bubble; Film bubble is being folded into plane by collapser; After drawing by draw-gear again, reeled by volume film roller; It is characterized in that:
The temperature in described extruder one district is that 170 DEG C～180 DEG C, the temperature in 2nd district are that 180 DEG C～190 DEG C, the temperature in 3rd district are 180 DEG C～200 DEG C; The temperature of described threeway is 195 DEG C～220 DEG C, and the temperature of described die head is 200 DEG C～240 DEG C;
In described threeway, the diameter of screen pack is 90mm, 90 order～100 orders;
On described die head, the diameter of plug is that 46mm, length are 1250mm.
2. the preparation method of the ultra-thin polyethylene film of middle size according to claim 1, is characterized in that: the polythene PE LA5000S of polythene PE HD5301AA, 20wt% that described polyvinyl resin material is 38wt%, the PEHD9455F of 38wt%1, 4wt% PELL0220KJ.
3. the preparation method of the ultra-thin polyethylene film of middle size according to claim 1, is characterized in that: described screen pack is at least three layers.
4. the preparation method of the ultra-thin polyethylene film of middle size according to claim 1, is characterized in that: the feed back of polythene PE HD5301AA, 45wt% that described polyvinyl resin material is 50wt%, the PELL0220KJ of 5wt%.
5. the preparation method of the ultra-thin polyethylene film of middle size according to claim 1, is characterized in that: described polyvinyl resin material is polythene PE HD5301AA.
6. according to the preparation method of the ultra-thin polyethylene film of middle size described in claim 4-5 any one, it is characterized in that: described screen pack is at least four layers.
7. the preparation method of the ultra-thin polyethylene film of middle size according to claim 1, is characterized in that: described screen pack is metal filter screen.
8. inflation film manufacturing machine, comprises extruder, threeway, die head, vane, plug, surely steeps frame, collapser, the first draw-gear, the second draw-gear, rolls up film roller;
Described die head is arranged on the extruding end of described extruder by described threeway, described vane is arranged on described die head, the middle part of described die head is coaxially installed with described plug, described plug top is provided with described steady bubble frame, on steady bubble frame, be provided with described collapser, the top of described collapser is provided with described the first draw-gear, described the second draw-gear in order to by the packaging film feeding after described the first draw-gear traction to described volume film roller; It is characterized in that:
In described threeway, the diameter of screen pack is 90mm, 90 order～100 orders; Described screen pack is at least three layers; On described die head, the diameter of plug is that 46mm, length are 1250mm.
9. inflation film manufacturing machine according to claim 8, is characterized in that: described screen pack is metal filter screen.
10. the ultra-thin polyethylene film of middle size that uses the preparation method as described in claim 1-7 any one to prepare, is characterized in that: its width of the ultra-thin polyethylene film of described middle size is that 80cm～110cm, thickness are 0.0025mm～0.006mm.
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| CN111491719A (en) * | 2017-12-18 | 2020-08-04 | 香港科技大学 | Synthesis method of flexible multifunctional high-porosity ultrathin polyethylene film |
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