CN1278843C - Coextruded, stretched and compounded two-way tensile tubular film with hot sealing layer and its producing method - Google Patents
Coextruded, stretched and compounded two-way tensile tubular film with hot sealing layer and its producing method Download PDFInfo
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- CN1278843C CN1278843C CN 03117964 CN03117964A CN1278843C CN 1278843 C CN1278843 C CN 1278843C CN 03117964 CN03117964 CN 03117964 CN 03117964 A CN03117964 A CN 03117964A CN 1278843 C CN1278843 C CN 1278843C
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Abstract
The present invention provides a co-extrusion stretching and composite bidirectional stretching-resistant cylindrical film with a heat-sealing layer. The cylindrical film is compounded by at least four layers of films comprising at least one layer of weft unidirectional stretching oriented film or stretching oriented film whose weft strength is higher than warp strength, at least one layer warp unidirectional stretching oriented film or stretching oriented film whose warp strength is higher than weft strength. One layer of adhesive film layer compounded along with the warp stretching film or the weft stretching film in a co-extrusion mode is arranged between the stretching oriented films. The outermost layer and/or the inner layer of the cylindrical film is a layer of polymer film layer which is compounded along with the warp stretching film or the weft stretching film in the co-extrusion mode and has excellent heat sealability; seams does not exist on the cylindrical circumference of the cylindrical film. The stretching oriented films are obtained by that films are reheated over vitrification temperature and below viscous flow state temperature and then are stretched and oriented in the single direction after cooled and shaped under the viscous flow state. The present invention also provides a method for manufacturing the cylindrical film.
Description
Technical field:
The present invention is relevant with the tear-resistant laminated film that the monodirectional tension film composite combined forms bidirectional stretch, make up after the simple tension of special and which floor coextrusion composite membrane of periosteum method and be combined into the tear-resistant skin of bidirectional stretch and/or the compound tubular film that nexine has hot sealing layer, it is relevant to dissect the composite membrane and the manufacture method thereof that can become flat film after the expansion.
Background technology:
Biaxial stretching film of the present invention and multi-layer co-extruded biaxial stretching film with hot sealing layer are produced existing mature technology with flat embrane method, but production has the unidirectional stretch-proof film of hot sealing layer and do not appear in the newspapers with the technology that flat embrane method is produced; With periosteum method manufacture order to stretched film, wherein one deck warp direction stretching film or broadwise stretched film utilize the coextrusion complex technique with its coextrusion one deck binding agent rete, utilize this layer to extrude and stretching but binding agent rete that adhesive property remains do not appear in the newspapers the compound technology that becomes the composite membrane of bidirectional stretch for one of warp direction stretching film and the combination of broadwise stretched film bonding yet with it, how produce the polymeric layer of one deck heat sealability excellence at the nexine of tubular film, only there is at present coating machine in utilizing on stretched film, to utilize the compound one deck of combination composite methods not stretch but has the film of heat-sealing excellent properties, do not relate to film in skin and/or the compound such function of nexine, also do not relate to the compound mode of coextrusion and extrude compound this tunic, more not relating to and report not only also will be in company with the tubular film that hot sealing layer is arranged that is combined into bidirectional stretch after warp-wise or the stretching of broadwise film again with coextrusion.
Number of patent application 00113159.1, " production method and the device of bidirectional stretch tubular compound film sheet peace film compound film sheet ", utilized the multiple film sizing mechanism of hot case fit body instant heating case in this technology, and the technology of the storing hollow shaft mechanism of the promptly interior complex membrane mechanism of whole cloth mechanism.This patent is the compound of film and film, particularly the simple tension film is made outer membrane, with coextrusion the compound of the film of making inner layer film after the film drawn orientation of adhesive layer and film arranged, though adopted coextrusion to have the binding agent tunic to make interior pad pasting, carry out the compound of outer membrane and inner layer film, but still employing is the method and the device of hot case fit body of class formula and the whole cloth mechanism of class formula, the problem of this scheme is the film strength height of the multiple film of requirement, thickness can also carry out, but slim can't realize, individual layer thickness after simple tension is greater than 0.1 millimeter, internal layer will participate in compound interior pad pasting also greater than 0.1 millimeter, can be conveniently compound, but the simple tension of general no process, the film that intensity is not high or be lower than 0.1 millimeter film through simple tension but thickness and just damaged at film when supporting the gap of tube and support roller, do not reach the technological requirement of multiple film, production can't realize.
Pad pasting need dock heat-sealing because of bag technological requirement from now at the folding opposite face afterwards of tubular film in some, and is this
Pad pasting is because of bag technological requirement from now in some, opposite face need dock heat-sealing in the folding back of tubular film, this film bag needs the heatproof degree of material of the face that will dock of inner face low and thermal bonding is good, lower with outer membrane and interior pad pasting than heatproof degree, but heat adhesiveness is had relatively high expectations, this layer innermost layer film comes sizing if the interior sizing tool of employing promptly supports tube, and the innermost layer film that this layer employing coetrusion in can making easily on the pad pasting is enclosed is bonded in and supports the compound realization that tube upward can not make this material or functional membrane.
Summary of the invention:
The coextrusion that is beneficial to environmental protection and the industrial hygiene safety tubular film that hot sealing layer is arranged of compound bidirectional stretch that stretches is provided in order to provide a kind of tensile strength high and thermal bonding is good.Another object of the present invention is can not only answer film at the tube-shaped fabric inwall in order to provide a kind of, also can be at the multiple film of plastics tubular film inwall, can not only the combined strength bination height, film that thickness is thick, the stretch manufacture method of the tubular film that hot sealing layer is arranged of compound bidirectional stretch of the coextrusion of the film of also can combined strength bination weak, thin thickness.
The object of the present invention is achieved like this:
The stretch tubular film that hot sealing layer is arranged of compound bidirectional stretch of coextrusion of the present invention is composited by at least four tunics, comprise one deck broadwise at least monoway stretch-oriented or latitudinal strength be higher than the stretch orientation film of warp-wise intensity, at least one deck warp-wise monoway stretch-oriented or warp-wise intensity be higher than the stretch orientation film of latitudinal strength, one deck is arranged with warp direction stretching film or the compound binding agent rete of broadwise stretched film coextrusion between the stretch orientation film, at the outermost layer of tubular film and/or nexine is one deck with the polymer film of the compound heat sealability excellence of warp direction stretching film or the coextrusion of broadwise stretched film, the tubular film does not have seam on the tubular circumference, above-mentioned stretch orientation film is meant under viscous state behind the cooling and shaping, heat again more than vitrification point, the following stretch orientation film of viscous state temperature through monoway stretch-oriented processing, make up compound tubular film in membrane structure, there is the warp direction stretching film can bear the tensile strength of warp-wise, there is the broadwise stretched film can bear the tensile strength of broadwise, there is the binding agent rete that warp-wise and broadwise stretched film are bonded as one between the stretched film, make up compound tubular film and the film strength that stretches separately before compound is all arranged in warp-wise and broadwise, just can overcome simple tension film macromolecular chain segment aligns and very high tensile strength is arranged being along draw direction, but it is very low in its vertical direction tensile strength, and the deadly defect of very easily tearing and become through, latitudinal strength is all high, and tear resistance well makes up composite membrane, because outermost layer and/or nexine at the tubular film are the polymer films of one deck heat sealability excellence, the use and the utility function of this tubular film are not fully exerted, the professional person knows, though the crystallinity stretched film has very high intensity along draw direction, but it is very difficult that heat-sealing between them is got up, melt temperature is low, and heat-sealing or heat seal are not firm, the temperature height just destroyed its molecular orientation, make the loss of fusion points film strength make film lose the tensile strength of stretched film too greatly, the polymeric layer that one deck heat sealability excellence is arranged on stretched film, just can be when the stretched film fusion being connected or seals, only hot sealing layer is produced welding, and do not have influence on the intensity of stretch film layers.Utilize the hot sealing layer of tubular film nexine can be easily the tubular film be made cutting off a mouthful two seal mouthful and have warp-wise and broadwise all has very high strength and the also very high packaging bag of sealing-strength.If all have the tubular film of hot sealing layer to cut expansion open outer and nexine, can obtain flat diaphragm, because all there is hot sealing layer on the flat diaphragm two sides, can easily flat diaphragm be carried out fusion connects, can produce large-area film such as the geomembrane covered like this, the paulin film, if need higher intensity at warp-wise or the some directions of broadwise, can utilize the compound technology of combination to make up one deck stretched film at warp-wise or broadwise more, make the intensity of its this direction higher, also can utilize it to extrude compound and stretching technique, the three layers of warp-wise that coextrusion is thicker or the base film of broadwise stretched film stretch, the binding agent rete is adopted in intermediate layer in three layers, owing to there is the intermediate layer more soft than same thick individual layer stretched film, more soft with all the other compound backs of stretched film combination with the film that same thick only depending on thickens film, tear resistance is better, the stretched film that makes up in the compound tubular film is crystal type polypropylene and copolymer (PP) thereof, high density polyethylene (HDPE) (HDPE), poly terephthalic acid-glycol ester (PET), nylon (PA) and non-crystalline type polystyrene (PS); Adhensive membrane be compound with warp-wise or the coextrusion of broadwise stretched film, stretch after not with the binary that still mainly is amorphous state of draw direction orientation or terpolymer such as ethene one acetate ethylene copolymer (EVA), Ethylene ethylacrylate copolymer, also can be polyamide, ionic resin, polyurethane etc.; The heat-sealing tunic is with still not being the resin of amorphous such as low density polyethylene (LDPE), linear polyethylene, ethene one acetate ethylene copolymer, polyamide glue, Polyurethane glue and other and copolymer thermoplastic adhesive, blend etc. with the draw direction orientation after the stretching of the compound heat sealability excellence of warp-wise or the coextrusion of broadwise stretched film.
Above-mentioned tubular film is composited by four tunics, by being respectively outward the warp direction stretching film inward, adhensive membrane, the broadwise stretched film, heat-sealing film or broadwise stretched film, adhensive membrane, the warp direction stretching film, the polymer film of heat sealability excellence, making up compound tubular film is the basement membrane of typical tubular package, because tubular film innermost layer is the polymer of heat sealability excellence, make this tubular film be used to produce the packaging bag optimum, utilizing hot sealing layer that the tubular bag is carried out heating and melting seals or seals, firm welding between the hot sealing layer, utilize the melt temperature of hot sealing layer lower, film after the stretching is heatproof relatively, fusion temp improves, between big temperature difference is arranged, heat sealing or heat-sealing tubular film but kept the tensile strength of stretched film simultaneously again easily.This packaging bag can replace the coating film bag of coating film bag, woven bag and the brown paper of woven bag on the cost performance, and can replace three-layer co-extruded middle level is the poly packaging bag of metallocene, and this bag also helps and reclaims and be beneficial to environmental protection.The stretched film of this tubular bag is polypropylene or high density polyethylene (HDPE), and binding agent is ethene one vinyl acetate co-polymer and composition thereof, and hot sealing layer is the blend of LDPE or LLDPE and EVA.
This above-mentioned tubular film is composited by five tunics, comprise one deck broadwise at least monoway stretch-oriented or latitudinal strength be higher than the stretch orientation film of warp-wise intensity, at least the simple tension of one deck warp-wise or warp-wise intensity be higher than the stretch orientation film of latitudinal strength, one deck is arranged with warp direction stretching film or the compound binding agent rete of broadwise stretched film coextrusion between the stretched film, outermost layer and innermost layer at the cartridge type film have the polymer film of one deck with the compound heat sealability excellence of stretch orientation film coextrusion respectively, make up compound tubular film, as above-mentioned film, just the outermost layer at the tubular film has increased one deck hot sealing layer, after cutting expansion tubular film open, all there is hot sealing layer on the flat film two sides of this expansion, helping fusion between the flat film connects and continues, all there is hot sealing layer on the two sides, the material of heat-sealing tunic generally all mainly is amorphous state, flexibility and anti-puncturing property are preferably arranged, also easily compound with other material such as spin laced fabric, can make geotechnological material, stretched film as polyethylene film or polypropylene screen, binding agent is ethene one vinyl acetate co-polymer and blend thereof, and hot sealing layer is LDPE; Also can make the middle-and-high-ranking paulin of heavy construction, as the nylon stretched film, binding agent and hot sealing layer are polyamide or polyurethane adhesive and copolymer thereof; Also can make low-grade building and cover the paulin such as the polyethylene stretched film of usefulness, the method is produced the composite membrane that obtains wide cut that the tubular film obtain can be more more economical than flat-die method, binding agent is ethene one vinylacetate and copolymer thereof, and hot sealing layer is the blend of LLDPE and EVA.
Above-mentioned one deck warp direction stretching film or the broadwise stretched film of in the stretch orientation rete of warp-wise or broadwise, increasing at least respectively, on the basis of above-mentioned film, increase an one deck warp direction stretching film and a compound with it layer binder of extruding, or increase an one deck broadwise stretched film and a compound with it layer binder of extruding.
The manufacture method of the tubular film that hot sealing layer is arranged of coextrusion stretching of the present invention and compound bidirectional stretch, a. produce the warp direction stretching film of individual layer or composite membrane or warp direction stretching film and the binding agent and the three-layer co-extruded compound periosteum base film of hot sealing layer of warp direction stretching film and two layers of co-extrusion of binding agent with the multi-layer co-extruded method of inflation film manufacturing machine, after the cooling, the base film is being heated to below the viscous state temperature, under the above temperature conditions of glassy state temperature periosteum base film is stretched into to pass through with the periosteum inflation and carries out warp direction stretching and thermal contraction fixation and cool off rolling to stretching and thermal contraction fixation and cooling rolling or with the roller of the warp direction stretching machine of roll-type, become the tubular film part A that hot sealing layer is arranged that will make up compound bidirectional stretch of operation down, the semi-finished product stretching tubular film A of this moment is because of the process warp direction stretching, macromolecular chain segment is warp-wise and aligns, though compound binding agent and hot sealing layer are because of being that amorphous materials is stretched processing through drawing on the stretched film two sides respectively, big molecule still is amorphous.
B. produce the periosteum base film of the three-layer co-extruded compound film of the composite membrane of the broadwise stretched film of individual layer or broadwise stretched film and two layers of coextrusion of binding agent or broadwise stretched film and binding agent and hot sealing layer with multi-layer co-extruded pipe die method, after the cooling, the base film is being heated to below the viscous state temperature, under the temperature conditions more than the glassy state temperature, carry out the stretching of broadwise inflation and thermal contraction fixation and cooling rolling through periosteum inflation stretching-machine, become another part B of the tubular film that hot sealing layer is arranged that will make up compound bidirectional stretch of operation down, the semi-finished product stretched film B of this moment is because of stretching through broadwise, macromolecular chain segment is broadwise and aligns, though compound binding agent and hot sealing layer are because of being that amorphous materials is stretched processing through drawing on the stretched film two sides respectively, big molecule still is amorphous.
C. the tubular film A that film placing mechanism is run out pinches on hollow major axis, the tubular film B that film placing mechanism is run out passes from hollow major axis, under pinching, at least one group of traction nip rolls enter the multiple film sizing mechanism of hot case, heat under the heater effect in the multiple film sizing mechanism casing of hot case and make the tubular film B and the tubular film A that are compounded with adhesive layer obtain required bond vitrified temperature, meanwhile give compressed air and be close to tubular film A so that tubular film B expands to tubular film B inwall, tubular film B under the effect of at least one group of casing membrane end traction membrane nip rolls then, tubular film A is compacted and secure bond is an one forms the stretch tubular film that hot sealing layer is arranged of compound bidirectional stretch of coextrusion, individual layer or 2 layers or 3 laminar coextrusion complex methods make the individual layer binder free, the warp direction stretching film base pipe of no hot sealing layer, or make the warp direction stretching film base pipe that skin has 2 layers of coextrusion of hot sealing layer, or make skin hot sealing layer is arranged, internal layer has the warp direction stretching film embryonic tube of 3 layers of coextrusion of adhesive layer, under to periosteum inner chamber inflation maintenance tubular situation, the base pipe is heated to the temperature that is fit to stretching through periosteum inflation stretching-machine, utilize this at least two pairs of inflation stretching-machine to have the speed difference of the nip rolls of 3 to 9 times of speed differences that the periosteum base that heats is carried out warp direction stretching and carries out thermal contraction and cooling processing and rolling, make individual layer with individual layer or 2 layers or 3 layers of coextrusion complex method, or there are 2 layers of hot sealing layer, or there is hot sealing layer that 3 layers broadwise stretched film base pipe of adhesive layer is arranged, on periosteum inflation stretching-machine, the periosteum inner chamber is inflated, periosteum is being heated under the temperature conditions that is fit to stretch, periosteum is stretched to the broadwise that it carries out 3 to 9 times with the inflation method, and thermal contraction and cooling processing and rolling, warp direction stretching film and broadwise stretched film is compound, broadwise stretched film such as: individual layer warp direction stretching film and 3 layers is compound, can obtain 4 tunic structures of warp direction stretching film/bond layer/broadwise stretched film/hot sealing layer; Compound such as the broadwise stretched film that: the warp direction stretching film that 2 layers of its internal layer is bonding agent and 2 layers of its internal layer are hot sealing layers, also can get 4 layers of above-mentioned structural membrane; Such as: 2 layers of warp direction stretching film and 3 layers of compound 5 tunic structure that obtains hot sealing layer/warp direction stretching film/bond layer/broadwise stretched film/hot sealing layer of broadwise stretched film that its skin is a hot sealing layer; Such as: 3 layers of its skin are hot sealing layers, and internal layer is an adhesive layer, and the centre is that 3 layers of co-extrusion stretched film of warp direction stretching film and broadwise stretched film that 2 layers of its internal layer is hot sealing layer are compound, also can get above-mentioned 5 tunic structures; Such as: the warp direction stretching film that 2 layers of its internal layer is adhesive layer and 2 layers of its internal layer broadwise stretched film that is hot sealing layer compound after, the warp-wise oriented film that is binding agent with 2 layers of its internal layer in its outside is compound with compound 4 good tunics again, can obtain the 6 tunic structures of being made up of warp direction stretching film/bond layer/warp direction stretching film/bond layer/broadwise stretched film/hot sealing layer that have 2 layers of warp direction stretching film to strengthen; Such as: a transposition can be done in the warp direction stretching film of the film of four layers, five layers, six layers above-mentioned structure and the position of broadwise stretched film in composite membrane and adjust, just can obtain the broadwise stretched film at the film of outer warp direction stretching film in another structure of nexine.
Before the film nip rolls tubular film B is bled so that there is not air in the interlayer of tubular film B and tubular film A and secure fit and bonding entering in the above-mentioned method.
In the above-mentioned method during inflation tubular film B, to tubular film A sizing.
Be casing 1/4th length places at casing membrane end in the above-mentioned method, to the tubular film cooling of compound sizing.
The present invention adopts has one deck with radial drawing film or the compound binding agent rete of broadwise stretched film coextrusion between stretching stretching tubular film A and stretching tubular film B, outermost layer and/or nexine at the tubular film are the polymer films of one deck heat sealability excellence, and this rete is compound with radial drawing film or the coextrusion of broadwise stretched film.The stretch tubular film tearing toughness that hot sealing layer is arranged of compound bidirectional stretch of coextrusion of the present invention, bidirectional stretch intensity height, middle seam free are made bag easily and reduce and do bag process.The manufacture method of tubular film of the present invention can be eliminated the technology pottery with solvent coated binding agent on interior pad pasting, is beneficial to environmental protection and industrial hygiene safety, and co-extrusion efficient height has been simplified equipment, simplified operation.Can not only be at the multiple film of tube-shaped fabric inwall, also can be at the multiple film of plastics tubular film inwall, can not only the combined strength bination height, film that thickness is thick, the film of also can combined strength bination weak, thin thickness.
Description of drawings:
Fig. 1 is the tubular membrane structure schematic diagram of the present invention that four tunics are arranged.
Fig. 2 is the tubular membrane structure schematic diagram of the present invention that five tunics are arranged.
Fig. 3 is the tubular membrane structure schematic diagram of the present invention that six tunics are arranged.
Fig. 4 is another structural representation of tubular film of the present invention that six tunics are arranged.
Fig. 5 is the tubular film of the present invention structural representation again that six tunics are arranged.
Fig. 6 is a device schematic diagram of producing warp direction stretching cylindrical plastic film sheet A.
Fig. 7 produces the device schematic diagram that cylindrical plastic film sheet B is stretched in the broadwise position.
Fig. 8 is multiple film device structure structural representation.
Fig. 9 is the vertical view of Fig. 8.
Figure 10 pinches the device structural representation among Fig. 8.
The specific embodiment:
Embodiment 1:
Fig. 1 has provided embodiment 1 tubular membrane structure schematic diagram.The tubular film does not have seam, and the compound hot sealing layer of coextrusion 1 is arranged from the inside to surface, broadwise stretched film 2, binding agent rete 3, warp direction stretching film 4.
Embodiment 2:
Fig. 2 has provided embodiment 2 tubular membrane structure schematic diagrames.Present embodiment 2 is basic same with embodiment 1, and not existing together is that coextrusion is compounded with hot sealing layer 5 outside warp direction stretching film 4.
Embodiment 3:
Fig. 3 has provided embodiment 3 tubular membrane structure schematic diagrames.Present embodiment 3 is basic same with embodiment 1, and not existing together is that coextrusion is compounded with binding agent rete 6, warp direction stretching film 7 outside warp direction stretching film 4.
Embodiment 4:
Fig. 4 has provided embodiment 4 tubular membrane structure schematic diagrames.Tubular film coextrusion from the inside to surface is compounded with hot sealing layer 1, warp direction stretching film 4, binding agent rete 3, broadwise stretched film 2, binding agent rete 6, broadwise stretched film 8.
Embodiment 5:
Fig. 5 has provided embodiment 5 tubular membrane structure schematic diagrames.Tubular film coextrusion from the inside to surface is compounded with hot sealing layer 1, broadwise stretched film 2, binding agent rete 3, warp direction stretching film 4, binding agent rete 6, broadwise stretched film 8.
Embodiment 6:
Fig. 6 is an installation drawing of producing warp direction stretching cylindrical plastic film sheet A.Comprise that band contains the multi-layer co-extruded inflation film manufacturing machine 13 of the rotary frame 12 of film head 9, air ring 10 extruders 11, traction rod 14, the rod formula heat stretching machine 19 that contains nip roll 15, stretching rod 16, thermal contraction processing rod (air-heater) 17, cooling stick 18, roll-type hot-drawn machine thermal source 20 on the heat stretching machine housing, thermal source (air-heater) 21 is handled in thermal contraction, cooling wind regime 22, rolling frame 23.
Fig. 7 produces the device schematic diagram that the broadwise stretching tube moulds material diaphragm B.Comprise the multilayer extrusion film machine 29 that contains die head 24, cooling vane 25, cooling water tumbler 26, a plurality of extruder that communicates with die head 27 carry-over pinch rolls 28, the blown film heat stretching machine 35 that contains carry-over pinch rolls 30, heater 31, draw roll 32, thermal contraction roller 33, chill roll 34, rolling frame 36.
Fig. 8～Figure 10 is multiple film device structural representation.
Referring to Fig. 8, Fig. 9, in the multiple film device storing hollow shaft mechanism 37 is arranged, be positioned at storing hollow shaft mechanism forward and backward second film placing mechanism 38, first film placing mechanism 39, the multiple film sizing mechanism 40 of hot case, rolling-up mechanism 41.The frame 43 that contains guide rail 42 is arranged in the storing hollow shaft mechanism 37, the hollow major axis 44 of the internal layer tubular film that can emit by second film placing mechanism that endoporus is hollow, array is evenly distributed on the tubular film that on the frame first film placing mechanism is run out and pinches motor-operated conveying roller group 45 that is subjected to of being inserted on the hollow major axis outer wall and can supporting hollow major axis, several pinch device 46, and what be positioned at hollow major axis front end prevents that hollow major axis string from moving and the baffle plate 47 of retaining film or cloth.Several pinch device and are contained in respectively and had on the dolly 49 that is subjected to the conveying roller group 48 that motor or chain drive that is contained on the guide rail by motor-operated several.It is axially forward and backward mobile at the hollow major axis in the promotion lower edge of several dollies that several pinch device, thereby promote film forward and backward moving on hollow major axis.Pinching device is made up of the clamping plate 50 that can upper and lower (or left and right) open and close as shown in figure 10.The on-off action of clamping plate is driven by cylinder 51.The frame bottom is contained in ground cross slide way 52, and frame is positioned on the cross slide way and along cross slide way is left and right and moves.Air exhauster 54 is arranged in the air ejector 53, be positioned at pipeline 55 1 ends that hollow major axis tail end is communicated with air exhauster and stretch into hollow major axis.In the multiple film sizing mechanism of hot case casing 56 is arranged, be positioned at the outer calibration sleeve of making by steel wire or porose steel plate 57 of casing, hot air circulation chamber 58 is contained in the far infra-red heater 59 on the hot air circulation heating clamber, and the air-heater 60 that communicates with the cycling hot air compartment is arranged on the casing.1/4 section apart from the port of export in casing has cold wind cooling chamber 61, and the air-cooler 62 to cold wind cooling chamber air intake is housed on the cold wind cooling chamber outer wall.Casing advances the film end has clamped that cylinder 63 drives many that nip rolls 64 advanced film nip rolls pinch mechanism 65.In the composite membrane that casing membrane end has with air compressor machine 66 is connected, give compressed air and be close to the hand-held needle tubing aerator 67 of outer cylindrical film or tube-shaped fabric inwall, membrane hauling machine 68 so that interior subsides tubular composite membrane expands to inwall.Have on the membrane hauling machine be subjected to nip rolls cylinder 69 and motor 70 that drive and compress inwall fitted the composite membrane that is compounded with tack coat tubular film or tube-shaped fabric and make the binding agent of composite membrane of inwall and tubular film or tube-shaped fabric secure bond many to membrane nip rolls 71.Chevron shaped clamping plate 72 are contained in and are positioned at the membrane nip rolls on the membrane hauling machine and can make tubular film or tube-shaped fabric smooth.Sequence number A, B, 73 represent that respectively outer tubular film, outer wall have the internal layer tubular film or the multiple film finished product of binding agent among Fig. 9.C, D, E represent the multiple film work station of 3 operate portions, work station 1, the work station 2 of storing hollow shaft mechanism respectively among Figure 10.When one group of storing hollow shaft mechanism carries out compound work on multiple film station, another group storing hollow shaft mechanism pinches the work of being inserted on the hollow major axis outer wall preparing to carry out on the station tubular film that film placing mechanism 38 runs out, mantle and multiple film work can be carried out simultaneously, increase work efficiency greatly.
The manufacture method step that hot sealing layer is arranged of coextrusion stretching of the present invention and compound bidirectional stretch is as follows:
A. produce the warp direction stretching film of individual layer or composite membrane or warp direction stretching film and the binding agent and the three-layer co-extruded compound periosteum base film of hot sealing layer of warp direction stretching film and two layers of co-extrusion of binding agent with device shown in Figure 6 and the multi-layer co-extruded method of inflation film manufacturing machine, after the cooling, the base film is being heated to below the viscous state temperature, under the above temperature conditions of glassy state temperature periosteum base film is stretched into to pass through with the periosteum inflation and carries out warp direction stretching and thermal contraction fixation and cool off rolling to stretching and thermal contraction fixation and cooling rolling or with the roller of the warp direction stretching machine of roll-type, become the tubular film part A that hot sealing layer is arranged that will make up compound bidirectional stretch of operation down, the semi-finished product stretching tubular film A of this moment is because of the process warp direction stretching, big molecular formula segment is the directed row of warp-wise and splits, though compound binding agent and hot sealing layer are because of being that amorphous materials is stretched processing through drawing on the stretched film two sides respectively, big molecule still is amorphous.
B. produce the periosteum base film of the three-layer co-extruded compound film of the composite membrane of the broadwise stretched film of individual layer or broadwise stretched film and two layers of coextrusion of binding agent or broadwise stretched film and binding agent and hot sealing layer with device shown in Figure 7 and multi-layer co-extruded pipe die method, after the cooling, the base film is being heated to below the viscous state temperature, under the temperature conditions more than the glassy state temperature, carry out the stretching of broadwise inflation and thermal contraction fixation and cooling rolling through periosteum inflation stretching-machine, become another part B of the tubular film that hot sealing layer is arranged that will make up compound bidirectional stretch of operation down, the semi-finished product stretched film B of this moment is because of stretching through broadwise, big molecular formula segment is the directed row of broadwise and splits, though compound binding agent and hot sealing layer are because of being that amorphous materials is stretched processing through drawing on the stretched film two sides respectively, big molecule still is amorphous.
C. with Fig. 8-device shown in Figure 10 the tubular film A that film placing mechanism runs out is pinched on hollow major axis, the tubular film B that film placing mechanism is run out passes from hollow major axis, under pinching, at least one group of traction nip rolls enter the multiple film sizing mechanism of hot case, heat under the heater effect in the multiple film sizing mechanism casing of hot case and make the tubular film B and the tubular film A that are compounded with adhesive layer obtain required bond vitrified temperature, meanwhile give compressed air and be close to tubular film A so that tubular film B expands to tubular film B inwall, during inflation tubular film B, to tubular film A sizing, tubular film B under the effect of at least one group of casing membrane end traction membrane nip rolls then, tubular film A is compacted and secure bond is an one forms the stretch tubular film that hot sealing layer is arranged of compound bidirectional stretch of coextrusion.
Claims (5)
1, requires the manufacture method of the tubular film that hot sealing layer is arranged of 1 described coextrusion stretching and compound bidirectional stretch as profit, it is characterized in that comprising the steps:
A. produce the warp direction stretching film of individual layer or composite membrane or warp direction stretching film and the binding agent and the three-layer co-extruded compound periosteum base film of hot sealing layer of warp direction stretching film and two layers of co-extrusion of binding agent with the multi-layer co-extruded method of inflation film manufacturing machine, after the cooling, the base film is being heated to below the viscous state temperature, under the above temperature conditions of glassy state temperature periosteum base film is stretched into to pass through with the periosteum inflation and carries out warp direction stretching and thermal contraction fixation and cool off rolling to stretching and thermal contraction fixation and cooling rolling or with the roller of the warp direction stretching machine of roll-type, become the tubular film part A that hot sealing layer is arranged that will make up compound bidirectional stretch of operation down, the semi-finished product stretching tubular film A of this moment is because of the process warp direction stretching, macromolecular chain segment is warp-wise and aligns, though compound binding agent and hot sealing layer are because of being that amorphous materials is stretched processing through drawing on the stretched film two sides respectively, big molecule still is amorphous.
B. produce the periosteum base film of the three-layer co-extruded compound film of the composite membrane of the broadwise stretched film of individual layer or broadwise stretched film and two layers of coextrusion of binding agent or broadwise stretched film and binding agent and hot sealing layer with multi-layer co-extruded pipe die method, after the cooling, the base film is being heated to below the viscous state temperature, under the temperature conditions more than the glassy state temperature, carry out the stretching of broadwise inflation and thermal contraction fixation and cooling rolling through periosteum inflation stretching-machine, become another part B of the tubular film that hot sealing layer is arranged that will make up compound bidirectional stretch of operation down, the semi-finished product stretched film B of this moment is because of stretching through broadwise, macromolecular chain segment is broadwise and aligns, though compound binding agent and hot sealing layer are because of being that amorphous materials is stretched processing through drawing on the stretched film two sides respectively, big molecule still is amorphous.
C. the tubular film A that film placing mechanism is run out pinches on hollow major axis, the tubular film B that film placing mechanism is run out passes from hollow major axis, under pinching, at least one group of traction nip rolls enter the multiple film sizing mechanism of hot case, heat under the heater effect in the multiple film sizing mechanism casing of hot case and make the tubular film B and the tubular film A that are compounded with adhesive layer obtain required bond vitrified temperature, meanwhile give compressed air and be close to tubular film A, then tubular film B under the effect of at least one group of traction membrane nip rolls of casing membrane end so that tubular film B expands to tubular film B inwall, tubular film A is compacted and secure bond is an one forms the stretch tubular film that hot sealing layer is arranged of compound bidirectional stretch of coextrusion.
2, coextrusion as claimed in claim 1 stretches and the manufacture method of the tubular film that hot sealing layer is arranged of compound bidirectional stretch, it is characterized in that before the film nip rolls tubular film B being bled so that there is not air in the interlayer of tubular film B and tubular film A and secure fit and bonding entering into.
3, the manufacture method of the tubular film that hot sealing layer is arranged of coextrusion stretching as claimed in claim 1 or 2 and compound bidirectional stretch is when is characterized in that inflation tubular film B, to tubular film A sizing.
4, the manufacture method of the tubular film that hot sealing layer is arranged of coextrusion stretching as claimed in claim 1 or 2 and compound bidirectional stretch is characterized in that at casing membrane end be casing 1/4th length places, to the tubular film cooling of compound sizing.
5, the manufacture method of the tubular film that hot sealing layer is arranged of coextrusion stretching as claimed in claim 3 and compound bidirectional stretch is characterized in that at casing membrane end be casing 1/4th length places, to the tubular film cooling of compound sizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117964 CN1278843C (en) | 2003-05-30 | 2003-05-30 | Coextruded, stretched and compounded two-way tensile tubular film with hot sealing layer and its producing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117964 CN1278843C (en) | 2003-05-30 | 2003-05-30 | Coextruded, stretched and compounded two-way tensile tubular film with hot sealing layer and its producing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1473700A CN1473700A (en) | 2004-02-11 |
| CN1278843C true CN1278843C (en) | 2006-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117964 Expired - Fee Related CN1278843C (en) | 2003-05-30 | 2003-05-30 | Coextruded, stretched and compounded two-way tensile tubular film with hot sealing layer and its producing method |
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| Country | Link |
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| CN (1) | CN1278843C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311960C (en) * | 2004-02-26 | 2007-04-25 | 甘国工 | Method and device of continuous producing orthogonal complex bidirection antistretching cylindrical film having heat-seal lager |
| CN100355554C (en) * | 2004-10-13 | 2007-12-19 | 甘国工 | Continuous method for fabricating orthogonal composite bidirectional tensile cylindrical shaped membrane with heat seal layer, and equipment |
| CN105291416B (en) * | 2015-11-16 | 2017-10-20 | 湖南银丰塑料包装有限公司 | One kind easily tears antibacterial PE films system of processing |
| CN108481866B (en) * | 2018-04-04 | 2019-08-30 | 厦门长塑实业有限公司 | A kind of heat sealable BON biaxially oriented nylon film and preparation method thereof |
| CN112693199B (en) * | 2020-12-21 | 2023-08-01 | 张家港永和包装印务有限公司 | Easy cover film of packaging paper container and heat sealing layer thereof |
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2003
- 2003-05-30 CN CN 03117964 patent/CN1278843C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1473700A (en) | 2004-02-11 |
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