CN1067945C - Web of layered film used in sealed bag and sealed bag made of same - Google Patents
Web of layered film used in sealed bag and sealed bag made of same Download PDFInfo
- Publication number
- CN1067945C CN1067945C CN94105362A CN94105362A CN1067945C CN 1067945 C CN1067945 C CN 1067945C CN 94105362 A CN94105362 A CN 94105362A CN 94105362 A CN94105362 A CN 94105362A CN 1067945 C CN1067945 C CN 1067945C
- Authority
- CN
- China
- Prior art keywords
- laminate film
- film
- little otch
- sealing bag
- bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 52
- 239000005001 laminate film Substances 0.000 claims description 44
- 238000003466 welding Methods 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 12
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims 1
- 241000876833 Emberizinae Species 0.000 abstract 1
- 239000010408 film Substances 0.000 description 43
- 239000000463 material Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000010410 layer Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 229920001684 low density polyethylene Polymers 0.000 description 5
- 239000004702 low-density polyethylene Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 241001293164 Eutrema japonicum Species 0.000 description 2
- 235000000760 Wasabia japonica Nutrition 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000014102 seafood Nutrition 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical class C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000011172 small scale experimental method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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- Packages (AREA)
Abstract
The present invention relates to a laminated film wound package used for a sealing bag, and the sealing bag manufactured by the film wound package. Many small incisions are continuously arranged along the length direction of a laminated film on the edges of both ends in the width direction of the laminated film, the small incisions are formed by bunting and pressing the film on a triangular minute protrusion, and parts which are deformed into convex shapes are arranged on one surface in the thickness direction of the film. The diameter R1 of the laminated film wound package on a central part in the width direction and the diameter R2 of the laminated film wound package on two end parts in the width direction satisfy the following relational expression: R2/R1=1.003-1.01.
Description
The present invention relates to laminate film package that the manufacturing for usefulness sealing bags such as filling food provides and the sealing bag made from this film package, the sealing bag in the easy Kaifeng that relates to the laminate film package that is used for processing and make with it, the practical intensity of its bag that do not detract can break a seal with finger strength.
Recently, by plastic sheeting and by the laminate film of other materials such as metals such as plastics and aluminium foil, paper owing to have advantage in light weight, that air-tightness good, intensity is high, easy-to-use, and sealing the time does not need special lining cement, as long as hot melt just can engage, so be usually used in the sealing bag of varied commodity such as food, medicine, little article etc., aqueous, Powdered, paste, decorating film.
This being sealed in when Kaifeng bag, the advantage that plastic or other material has becomes the resistance of anti tear conversely, so that the problem that is difficult to break a seal occurs.In case also exist the tendency of the easy propagation of this damage of generation damage at sealing bag with the reverse side of film obdurability,, can make a bag Kaifeng just need only this be damaged the cut stretching that forms with finger strength if therefore on the end limit of bag, make damage in advance.
For this reason, provide following method, used the film package cut into the size that is suitable for the pocket size of wanting, pocket is made in its end limit thermal welding, it is otch (I shape otch) more than the 2mm that a local edge bag transverse direction on gained bag end limit is provided with length; Another kind method is to replace I shape otch with V-notch; Perhaps bore a hole at regular intervals with sharp keen cutlery etc. along the end line on end limit.
But above-mentioned prior art all respectively exists following shortcoming.
With regard to the way that I shape otch is set, exist the shortcoming that where is provided with cut that is not easy to find on the end limit of bag.In the method for V-notch was set, though the discovery of cut is more or less freely, when a large amount of bags and filling, the V-arrangement part can disperse and stick on the packing articles, and the tendency that operating environment is worsened is arranged.In addition, in the above-mentioned method that I shape otch and V-notch be set, because cut is limited to a place, this position Chang Buneng breaks and can propagate to the direction of non-original idea at desirable position, the inconvenience that causes that packed thing disperses towards periphery etc.Also have, because the existence of large-scale otch (to the youthful and the elderly 2mm) causes breakage as if handling ease on film before the bag, so that can not bag.
In addition, in the above-mentioned method that perforation is set, though have the strong point that can cut off from any part in the end sideline of sealing bag, because perforation, the part of film drops entirely so that disperses, and stays the problem same with the occasion of above-mentioned employing V-notch.And exist the cutlery eyelet to stop up, cut off the effect problem of unstable that becomes.
On the other hand, above-mentioned these prior aries also have the common problem that exists, since uneven thickness, the coiling tension inequality, and package warpage in the use consequently often brings fault in the bag operation of operation afterwards.
The present invention seeks for this reason be a kind of can with above-mentioned various shortcoming improvement, can not drop, can not sneak into foreign matter, can not make that the practical intensity of film reduces, can be from the sealing bag of any part with finger strength Kaifeng, and in use scroll be difficult for defeated and dispersed, make the film package that sealing bag is used.
The present invention achieves the goal through studying with keen determination, can solve above-mentioned these problems, can provide a kind of and can not drop, can not sneak into foreign matter, can not make that the practical intensity of film reduces, can be from the sealing bag of any part with finger strength Kaifeng, and in use scroll be difficult for defeated and dispersed, make the film package that sealing bag is used.
The laminate film package that manufacturing sealing bag of the present invention is used, on two end limits of laminate film fabric width direction, length direction along this laminate film is provided with many little otch continuously, this little otch is film to be pressed on the projection of fine similar triangle form, the part that on a face of film thickness direction, has the convex of being deformed into, and, this little otch be with the direction of laminate film fabric width direction end sideline approximate vertical on the big elongated shape of length, length is below the above 0.5mm of 0.1mm, the column pitch of little otch have from interval as each little otch row line of centers with little otch equally or longer length, distance on the length direction of laminate film between adjacent little otch is below the above 2.0mm of 1.0mm, the laminate film that this sealing bag is used is wound into the film package, and this film rolling is contained between the diameter R2 at the diameter R1 of central part on the fabric width direction and fabric width direction both ends has following relation: R2/R1=1.003～1.01.In addition, sealing bag of the present invention, the end limit of the laminate film that will transport from above-mentioned laminate film package is carried out thermal welding and is formed sealing, it is characterized in that, thermal welding is implemented on the end sideline of sealing bag, perhaps stays non-weld at end on the limit, little otch be with the direction of sealing bag end sideline approximate vertical on the big elongated shape of length, and the little otch group of the one side of facing to bag and the position major part of the little otch group on the another side all are inconsistent mutually.
Adopt the present invention, scroll is difficult for defeated and dispersed laminate film package in the time of can obtaining using, and adopts this laminate film package, can not drop, can not sneak into foreign matter, the practical intensity of film is reduced, obtaining can be from the sealing bag of any part with finger strength Kaifeng.
Now accompanying drawing is done simple declaration.
Fig. 1 be the present invention relates to at the enlarged drawing that the jut on the machining tool that little otch uses is set on the film;
Fig. 2 is the section drawing of an example that the manufacturing process of this jut is shown;
Fig. 3 is the oblique drawing of processing disk;
Fig. 4 is the section drawing of little otch;
Fig. 5 is the planar view that the laminate film of little otch is set;
Fig. 6 is the front elevation of laminate film package of the present invention;
Fig. 7,8 and 9 oblique drawings for the sealing bag that the present invention relates to;
Figure 10 is the amplification sectional view of the sealing of sealing bag.
In addition, used label has following meaning among the figure:
The little otch that 1-runs through, the 9-metal covering, the 10-jut, the 11-pit, 12-erects face, the 13-working roll, the 16-base material layer, the 17-hot welding layer, face has fallen in 19-, 20-metal smooth surface, the 21-indentation, the 22-crest line, 23-holds the sideline.
Laminate film of the present invention, as long as though can make sealing bag with thermal welding, stand circulation and keeping, its material category needn't consider, but preferably use nylon, laminate film that film one deck that single shaft such as polyester, polypropylene or twin shaft extend gets up with superimposed layer.These films are tough, and otch is propagated more excellent when cut wound, makes the easier performance of effect of the present invention.During bag, general further with other plastic sheeting lamination that can thermal welding.As other plastic sheeting of energy thermal welding, the polyethylene-based copolymer resin of the ethylene series resin of use low density polyethylene (LDPE) etc., polyethylene-vinyl acetate copolymer etc. etc.Though the thermal welding temperature with the thickness of time of applied pressure, pressurization, film and kind etc. and different, is preferably in 80-180 ℃ scope, carries out between 120-150 ℃ usually, is in molten condition or is in the semi-molten state at least under such temperature.
Laminate film of the present invention is provided with many little otch along its length continuously on the limit, two ends of its fabric width direction.This little otch is film to be pressed on the jut of fine similar triangle shown in Figure 1 form.In addition, form on the plane of periphery that the jut of this similar triangle also can be by being located at many elongated blade tips metallic roll and/or metal sheet.For example on the smooth surface 20 of the metal sheet shown in Fig. 1 and 2, cut the indentation 21 of similar triangle, base with this similar triangle is a center shaft, the metal covering that makes incision cocked outstanding jut 10 that becomes from the original metal covering, the part of cutting stays pit 11, and jut 10 promptly erects face 12 relative metal coverings in pit side on one side angle is preferably more than 60 ° below 90 °.These jut assortments are become more than the row, be wire, all pass through quench hardening.Fig. 3 is the oblique drawing that is provided with the roller for machining 13 of this jut on periphery.
When adding with jut shown in Figure 1 10 when being pressed on the film, the edge part that erects face 12 plays a part blade tip, edge part in the face of erecting 12 1 sides enters in the film as the crow flies, and be pressed into by crowning 19 at the film of crowning 19 1 sides and enlarge otch, as shown in Figure 4, it is straight erecting the part that face 12 is pressed into, the part that crowning 19 is pressed into then oblique below distortion, difference is bigger, takes place crooked simultaneously.That is, be the boundary to cut openning, exist and have crooked partial sum and do not have crooked part, have crooked part and carried out thermal welding afterwards, though diff-H is eliminated substantially, be returned to original state, inner crooked still reservation this moment.Because this inner crooked intensity that makes reduces, therefore there is not crooked portion boundary just can tear simply with finger from having crooked partial sum, this is the important result that structure of the present invention has.And, different with common situation with the cutlery otch, on two tops of the little otch that runs through, can occur be full of cracks here, and this be full of cracks can improve the effect of impelling the cut-out beginning greatly.
The most handy hard material of instrument that the present invention uses is made, and except quenched steel, the stupalith of carborundum, titanium carbide, silicon nitride etc. also can use.In addition, after the shape completion of processing of the instrument made from metallic material, methods such as available CVD method or PVD method coat carborundum or titanium carbide etc. on it, and abrasion performance can be greatly improved like this, and sharpness is difficult for reducing, and are fit to very much use.
By little otch group is set on film end limit with above-mentioned instrument, the little otch that is provided with on the laminate film of the present invention as shown in Figure 4, film along the part that has the convex of being deformed on the one side of thickness direction, it be with the direction of laminate film fabric width direction end sideline approximate vertical on the big elongated shape of length, its length is below 0.5mm, be preferably in below the 0.3mm, more than the 0.1mm.In addition, as shown in Figure 5, sideline, little otch opposite end is in the transverse direction setting, the distance L between the adjacent little otch of the length direction of laminate film
1More than the 1.0mm, below the 2.0mm.The length of above-mentioned little otch is made into the outward appearance of bag when surpassing 0.5mm just plain, and the intensity of film is also impaired simultaneously, is difficult to use.And when length when 0.1mm is following, the tearing property of film is just unstable, the said R in back
2Diminish, therefore undesirable.Also has the distance L between above-mentioned little otch
1As surpassing 2.0mm, then cut becomes thin, and the effect that where can both break a seal of the present invention diminishes.Otherwise this distance L
1As below 1.0mm, the closeness of then little otch increases, and the intensity of film is impaired, simultaneously R
2Become excessive, be difficult to use.
In addition, in the present invention, the column pitch of little otch is from L
2Be important, this apart from as the centreline space of each little otch row every, must have identical with little otch or bigger length.When this distance than the length of little otch hour, the little otch closeness of per unit area increases, and is same, the intensity of film can be impaired, R
2Become big, be difficult to use.
The laminate film that obtains like this is rolled into the operation of tubular supply bag, and laminate film package of the present invention has the diameter R of package fabric width direction central part as shown in Figure 6
1Diameter R than both ends
2Little shape.This is to make on the face of film in the film thickness direction and have the male member of being deformed into because be provided with little otch on two of laminate film fabric width direction end limits, therefore the coiling tension of this laminate film can act on two end limits of package equably, and the defeated and dispersed phenomenon of scroll just is difficult to take place during the use that causes owing to reason such as uneven thickness so that coiling tension inequality.
At this, R
1Depend on pressure used when the thickness of the laminate film that batches and the length of batching, R2 depend on the closeness of little otch and forms little otch.
The relation of above-mentioned R1 and R2 must satisfy formula: R2/R1=1.003-1.01.As less than 1.003, the then above-mentioned defeated and dispersed effect of scroll that prevents diminishes, and is impracticable, but as surpass 1.01, prevent that the defeated and dispersed effect of scroll is no doubt fine, but the film two end portions stretches out too much, can become during bag that film is creeped or the occurrence cause of poor sealing.In addition, the pocket outward appearance of making is also plain.
Also have, in order to make R2/R1=1.003-1.01, except the formation (thickness, material) that should consider laminate film, preferably the shape of the blade of adjustment means, size, highly, the pressure of closeness and blade, the pressure etc. of pressure roller when batching, selected condition, can carry out small scale experiment in advance in case of necessity, selected suitable condition.
Second invention of the present invention is the sealing bag of making of above-mentioned laminate film package, as the form of bag, three face sealing types is as shown in Figure 7 arranged, and four sides closed type shown in Figure 8 etc. also have another kind shown in Figure 9 three face sealing types.
Above-mentioned sealing bag is provided with sealing in 3-4 place, the sealing that wherein has a place at least is by a laminate film package handle thin films, feasible limit, two ends coincidence the carrying out thermal welding that is provided with little otch forms, or by two films of two laminate film packages conveyings, with limit, the two ends coincidence thermal welding formation of each film.No matter any situation, as shown in figure 10, on the sealing that forms, the little otch group on the one side of the bag of joining in opposite directions and the little otch group's of another side position is inconsistent.Because this inconsistent, can prevent that sealing bag is casual breaks, and only can bring into play with the functional effect of finger strength with regard to where breaking a seal.
In addition, there are two kinds of situations in the sealing of bag; A kind of is to form thermal welding portion on the end limit of bag, and another kind is also to leave non-weld portion and form on the end limit, and no matter sealing bag of the present invention for which kind of situation can both be suitable for.
Introduce two embodiment of the present invention below.
(embodiment 1)
At base material layer is that nylon film (thickness is 15 μ), the hot welding layer that twin shaft extends is on the laminate film of low-density polyethylene foil (thickness is 60 μ), be pressed on the intensive working roll that is provided with as leg-of-mutton tab on the periphery, give and tear the little otch group who begins usefulness.Subsequently, cut little otch group's central authorities, form the film package that the 70mm that has little otch as shown in Figure 6 on film web cross direction end limit is wide, 1000m length is rolled into, little long incision 0.5mm, L1 are 1.5mm, and L2 is 0.5mm.The diameter R1 of this film package central part is 300mm, and the diameter R2 at both ends is 302mm, R2/R1=1.007.Therefore, coiling tension can act on two of the reel end limits equably, thus can with cause owing to reasons such as uneven thickness coiling tension uneven so that in use scroll defeated and dispersed be suppressed to bottom line.Adopt this film package that has little otch, available automatic stuffing packager will be made with extra care the wasabi filling and enter, and make the sealing bag that refining wasabi is housed of tripartite sealing pocket type simultaneously.
The bag that is drawn easily with hand Kaifeng, becomes the sealing bag of easily openable owing to be provided with little otch on the end limit of longitudinal sealing portion.
(embodiment 2)
At base material layer is that mylar (thickness is 12 μ), interlayer that twin shaft extends be low-density polyethylene (thickness is 15 μ) with aluminium foil (thickness is 7 μ), hot welding layer are to be pressed on the intensive working roll that is provided with as leg-of-mutton tab on the periphery on the laminate film of low-density polyethylene foil (thickness is 30 μ), gives and tears the little otch group who begins usefulness.Subsequently, the central authorities of cutting little otch group obtain having wide, the long film package that is rolled into of 1000m of 100mm of little otch as shown in Figure 3 on film web cross direction end limit.Little long incision 0.5mm, L1 are 1.5mm, and L2 is 0.5mm.The diameter R1 of this film package central part is 280mm, and the diameter R2 at both ends is 282.5mm, R2/R1=1.009.Therefore, coiling tension can act on two end limits of package equably, so can will cause the uneven defeated and dispersed bottom line that is suppressed to of scroll that consequently takes place in use of coiling tension owing to reasons such as uneven thickness.Adopt this film package that is provided with little otch, available automatic improved padding machine is entered the plain filling of refined powder seafood, makes the sealing bag that powder seafood element is housed of tripartite sealing pocket type.
Resulting bag is used for Kaifeng easily owing to be provided with little otch on the end limit of longitudinal sealing portion, becomes the sealing bag of easily openable.
Claims (3)
1. one kind for making the laminate film package that sealing bag is used, and on two end limits of laminate film fabric width direction, along the length direction of this laminate film many little otch is set continuously; It is characterized in that, this little otch is film to be pressed on the projection of fine similar triangle form, the part that on a face of film thickness direction, has the convex of being deformed into, and, this little otch be with the direction of laminate film fabric width direction end limit approximate vertical on the big elongated shape of length, length is below the above 0.5mm of 0.1mm, the column pitch of little otch have from interval as each little otch row line of centers with little otch equally or longer length, distance on the length direction of laminate film between adjacent little otch is below the above 2.0mm of 1.0mm, the laminate film that this sealing bag is used is wound into the film package, and this film rolling is contained between the diameter R2 at the diameter R1 of central part on the fabric width direction and fabric width direction both ends has following relation: R2/R1=1.003～1.01.
2. the laminate film package of using according to the sealing bag of claim 1 is characterized in that, laminate film is that the film that single shaft or twin shaft extend is carried out the laminate film of one deck with superimposed layer.
3. sealing bag requires the end limit portion of the laminate film that a laminate film package of record in 1 or 2 transports to carry out thermal welding Accessory Right and forms sealing; It is characterized in that, thermal welding is implemented on the end sideline of sealing bag, perhaps on the end limit, stay non-weld, little otch be with the direction of sealing bag end sideline approximate vertical on the big elongated shape of length, and little otch group on the one side of facing to bag and the position major part of the little otch group on the another side all are inconsistent mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105362A CN1067945C (en) | 1994-04-28 | 1994-04-28 | Web of layered film used in sealed bag and sealed bag made of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94105362A CN1067945C (en) | 1994-04-28 | 1994-04-28 | Web of layered film used in sealed bag and sealed bag made of same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110662A CN1110662A (en) | 1995-10-25 |
| CN1067945C true CN1067945C (en) | 2001-07-04 |
Family
ID=5032034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94105362A Expired - Lifetime CN1067945C (en) | 1994-04-28 | 1994-04-28 | Web of layered film used in sealed bag and sealed bag made of same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067945C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008016059A1 (en) | 2006-07-31 | 2008-02-07 | Mitsui Chemicals, Inc. | Film or laminate comprising ethylene resin or ethylene resin composition |
| JP5174333B2 (en) * | 2006-07-31 | 2013-04-03 | 三井化学株式会社 | Laminate resin composition and laminate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4768411A (en) * | 1986-11-07 | 1988-09-06 | W. R. Grace & Co., Cryovac Div. | Easy-open bag and apparatus and method for making same |
| EP0312393A1 (en) * | 1987-10-16 | 1989-04-19 | W.R. Grace & Co.-Conn. | Easy-open flexible pouch and apparatus and method for making same |
| CN1052459A (en) * | 1989-10-18 | 1991-06-26 | 西姆普-锡达普公司 | Constitute with the multilayer plastic film of the container of sealed with adhesive cover and the container made from this film |
-
1994
- 1994-04-28 CN CN94105362A patent/CN1067945C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4768411A (en) * | 1986-11-07 | 1988-09-06 | W. R. Grace & Co., Cryovac Div. | Easy-open bag and apparatus and method for making same |
| EP0312393A1 (en) * | 1987-10-16 | 1989-04-19 | W.R. Grace & Co.-Conn. | Easy-open flexible pouch and apparatus and method for making same |
| CN1052459A (en) * | 1989-10-18 | 1991-06-26 | 西姆普-锡达普公司 | Constitute with the multilayer plastic film of the container of sealed with adhesive cover and the container made from this film |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1110662A (en) | 1995-10-25 |
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| C14 | Grant of patent or utility model | ||
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| C56 | Change in the name or address of the patentee |
Owner name: ASAHI KASEI PARKES CO., LTD. Free format text: FORMER NAME OR ADDRESS: ASAHI CHEMICAL POLY LAYER CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: Asahi Kasei Corporation Parkes Patentee before: Asahi Chemical Poly Layer Co., Ltd. |
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Expiration termination date: 20140428 Granted publication date: 20010704 |