CN2616363Y - Cylindrical film having heat-sealing layer with coextrusion stretching and composite biaxial tension - Google Patents
Cylindrical film having heat-sealing layer with coextrusion stretching and composite biaxial tension Download PDFInfo
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- CN2616363Y CN2616363Y CN 03234636 CN03234636U CN2616363Y CN 2616363 Y CN2616363 Y CN 2616363Y CN 03234636 CN03234636 CN 03234636 CN 03234636 U CN03234636 U CN 03234636U CN 2616363 Y CN2616363 Y CN 2616363Y
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- coextrusion
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Abstract
The utility model provides a cylinder film of coextrusion stretching and against combined biaxial tension with heat sealing layer. The cylinder film is the recombination film of at least four films, which consists of at least a stretching oriented film of across warp oriented unilateral stretching or the intensity of across warp higher than that of the radial direction, at least a stretching oriented film of radial direction oriented unilateral stretching or the intensity of radial direction higher than that of the across warp, a adhesive film of coextrusion with the radial direction stretching film or the across warp stretching film and recombination provided between the stretching oriented films, and a polymer film of coextrusion with radical direction stretching film or the across warp stretching film, recombination and excellent heat sealing property disposed on the outermost layer and / or inlay of the cylinder film, the cylinder circumference of the cylinder film has no seam, wherein the stretching oriented film is a film of cooled and shaped on the viscous flow stage, suffering the oriented processing of unilateral stretching at the temperature of higher the glass transition temperature and lower the viscous flow temperature via heating. The utility model is in favor of environmental protection and safety of industrial hygiene.
Description
Technical field:
The utility model 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 that can become flat film after the expansion.
Background technology:
Biaxial stretching film of the present utility model 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 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.
The utility model content:
The purpose of this utility model is in order to provide a kind of tensile strength high and thermal bonding is good, 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.
The purpose of this utility model is achieved like this:
The stretch tubular film that hot sealing layer is arranged of compound bidirectional stretch of the utility model coextrusion 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 the simple tension film and align very high tensile strength being along draw direction because of the molecular formula segment, 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 along draw direction very high intensity is arranged, 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 monoethylene 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.
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.
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, the warp direction stretching film is compound by the described different film layer structure of claim 1 described method of C by claim 5 on the device of the multiple film of plastics tubular film inwall with the broadwise stretched film, 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.
The utility model adopts has one deck with warp direction stretching 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 warp direction stretching 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 the utility model coextrusion, bidirectional stretch intensity height, middle seam free are made bag easily and reduce and do bag process.
Description of drawings:
Fig. 1 is the utility model tubular membrane structure schematic diagram that four tunics are arranged.
Fig. 2 is the utility model tubular membrane structure schematic diagram that five tunics are arranged.
Fig. 3 is the utility model tubular membrane structure schematic diagram that six tunics are arranged.
Fig. 4 is another structural representation of the utility model tubular film that six tunics are arranged.
Fig. 5 is the utility model tubular film structural representation again that six tunics are arranged.
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.
Claims (4)
1, the tubular film that hot sealing layer is arranged of coextrusion stretching and compound bidirectional stretch, it is characterized in that the tubular film 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 and behind the cooling and shaping, heats more than vitrification point again, the following stretch orientation film of viscous state temperature through monoway stretch-oriented processing.
2, the tubular film that hot sealing layer is arranged of coextrusion stretching as claimed in claim 1 and compound bidirectional stretch, it is characterized in that the tubular film is composited by four tunics, by being respectively the polymer film of warp direction stretching film, adhensive membrane, broadwise stretched film, heat-sealing film or broadwise stretched film, adhensive membrane, warp direction stretching film, heat sealability excellence inward outward.
3, the tubular film that hot sealing layer is arranged of coextrusion stretching as claimed in claim 1 and compound bidirectional stretch, it is characterized in that this 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, the polymer film of one deck with the compound heat sealability excellence of stretch orientation film coextrusion arranged respectively in the outermost layer and the innermost layer of cartridge type film.
4, as the tubular film that hot sealing layer is arranged of claim 1 or 2 or 3 described coextrusion stretchings and compound bidirectional stretch, it is characterized in that in the stretch orientation rete of warp-wise or broadwise, increasing at least respectively one deck warp direction stretching film or broadwise stretched film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234636 CN2616363Y (en) | 2003-05-30 | 2003-05-30 | Cylindrical film having heat-sealing layer with coextrusion stretching and composite biaxial tension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234636 CN2616363Y (en) | 2003-05-30 | 2003-05-30 | Cylindrical film having heat-sealing layer with coextrusion stretching and composite biaxial tension |
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| Publication Number | Publication Date |
|---|---|
| CN2616363Y true CN2616363Y (en) | 2004-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03234636 Expired - Fee Related CN2616363Y (en) | 2003-05-30 | 2003-05-30 | Cylindrical film having heat-sealing layer with coextrusion stretching and composite biaxial tension |
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| CN (1) | CN2616363Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390026C (en) * | 2004-10-15 | 2008-05-28 | 甘国工 | Packaging bag combined bi-directional drawn cylindrical shaped membrane with not drawn cylindrical shaped membrane, and production method |
-
2003
- 2003-05-30 CN CN 03234636 patent/CN2616363Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390026C (en) * | 2004-10-15 | 2008-05-28 | 甘国工 | Packaging bag combined bi-directional drawn cylindrical shaped membrane with not drawn cylindrical shaped membrane, and production method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |