CN101020517A - Airtight antirust packing film for precise product - Google Patents
Airtight antirust packing film for precise product Download PDFInfo
- Publication number
- CN101020517A CN101020517A CN 200710021062 CN200710021062A CN101020517A CN 101020517 A CN101020517 A CN 101020517A CN 200710021062 CN200710021062 CN 200710021062 CN 200710021062 A CN200710021062 A CN 200710021062A CN 101020517 A CN101020517 A CN 101020517A
- Authority
- CN
- China
- Prior art keywords
- antioxidant
- polyethylene
- packing film
- weight ratio
- layer
- 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.)
- Granted
Links
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The airtight antirust packing film for precise product includes three layers integrated through extrusion and blowing, including one high toughness layer, one airtight layer and one antioxidant inner layer. The airtight antirust packing film has layer thickness of 0.03-0.10 mm and total thickness of 0.1-0.3 mm, and its high toughness layer is made of LLDPE, HDPE, LDPE with metallocene, strengthened PE or UHMWPE; the airtight layer is made of HDPE, LDPE with metallocene, strengthened PE of molecular weight 350000-450000 or UHMWPE of molecular weight over 1000000; and the antioxidant inner layer is made of PE, especially linear PE, with added antioxidant in 0.1-5 wt%.
Description
Technical field
The present invention relates to PE airtight antirust packing film, especially electronics and precision instrument and equipment product and use airtight rust resistance and corrosion resistance packing film.
Background technology
Product such as electronics and precision instrument and equipment has particular requirement on the packaging, as uses airtight antirust packing film, needs the rigidity of good penetration-resistant (air-tightness) and film, especially needs the anti-oxidation protection to packing material.
CN 97181099.0 has the polyolefin composition and its preparation method of balanced sealant properties and improved modulus, relate to and have balanced sealant properties and comprise sealing layer and the multiple-structure of polypropylene layer, wherein sealing layer comprises and by the poly-mer with specific molecular measure feature and second kind of polyvinyl polymer composition preparation.The middle density polyolefin film and the composite that relate to equilibrium response with fabulous low sealing initiation temperature and improved film modulus.This film is formed and is prepared by the mutually non-homogeneous or homogeneously branched ethylene polymer of at least a lower density homogeneously branched ethylene polymer and at least a higher density with composite.
The composite of CN200480031357 thermoplastic package combination is the combination that extrusion blow molded thermoplastic package comprises high-density polyethylene olefinic thermoplastic resin and low density polyethylene olefinic thermoplastic resin, and both ratios are that about 80% high-density polyethylene olefinic thermoplastic resin is to about 20% low density polyethylene olefinic thermoplastic resin in the described resin combination.
Chinese patent application CN200410084461.8 special film for container buffer air bag; Comprise toughening layer adhered to one another successively and air-retaining liner.Toughening layer is selected the poly-vinyl resin with higher-strength for use, preferably adopts density＞0.93g/cm3, the ultra-strong polythene resin of fusion index≤1.0.Toughening layer is selected from one of high density polyethylene (HDPE), metallocene low density polyethylene (LDPE), medium density polyethylene, enhancing polyethylene, ultra-high molecular weight polyethylene; It is the low density polyethylene (LDPE) compound of 30～40% metallocene ldpe resin, 30～40% linear low density polyethylenes and 20～40% that air-retaining liner preferably adopts percentage by weight.This special film for container buffer air bag has higher mechanical strength, and pulling strengrth is greater than 27MPa, good heat sealability and good air tightness
The application of CN01127112.4 2.4-di-tert-butyl-phenyl phosphite in the vinyon extruding-out process, the open new purposes of 2.4-di-tert-butyl-phenyl phosphite in the vinyon extruding-out process.Before the plastic extruding forming device power-up, to mix and stir raw material 5～15Kg with the 2.4-di-tert-butyl-phenyl phosphite ester of 50～150g and feed feeder hopper, start is extruded into mould and reveals and mouthful be advisable.So can effectively reduce aging scar mouth in the finished product.
CN93118257 stablizes the method for organic phosphite or phosphonate ester or they compound separately with the opposing hydrolysis, this method comprises a kind of sterically hindered aminated compounds of adding as stabilizer, the amines (in phosphite ester or phosphonate ester) that feasible phosphite ester that is stabilized or phosphonate ester contain 0.1～25% (weight).The stabilizer of synthetic polymer is to resist the infringement of heat, oxygen and/or light.
CN93120897. use the oligomeric HALS phosphite ester and the HALS phosphinate of used as stabilizers; new formula I oligomeric compound; wherein L represents the following formula group: wherein the oxygen atom among the group I links to each other with phosphorus atoms in the structural repeat unit; and the oxygen atom on the 4-position of R5 in the group L or piperidine ring in carbon atom and the structural repeat unit is connected; the definition of other symbol is described with claim 1; it is anti-oxidant that this oligomeric compound can be used as the protection organic material, the stabilizer of heat or photoinduction degraded.
Generally speaking, the film ubiquity intensity of domestic production at present is low, mainly contain the anti-oxidant of protective film organic material, and tensile strength is low, and poor air-tightness needs the high strength sealing film Production and Packaging bag of import.But prior art does not relate to the airtight antirust packing film of PE, and only being used for especially, electronic product uses airtight antirust packing film.Do not see that packing film also should have the sludgeproof performance of reducibility.
Therefore Development and Production goes out the film of a kind of high strength, anti-oxidant rust resistance and corrosion resistance, thereby can be widely used in the packing film of products such as various high-grade electronics and precision instrument, becomes those skilled in the art's technical issues that need to address.
Summary of the invention
The present invention seeks to: propose the packing film that a kind of sophisticated product uses, especially have the packing film that tensile strength high tenacity and air-tightness also have the rust resistance and corrosion resistance of high target, especially can be to the anti-oxidation protection of packing material; To overcome the deficiency that existing film is used.Thereby can be widely used in the packing film of products such as various high-grade electronics and precision instrument, and have good sealing property.
Technical solution of the present invention is: airtight antirust packing film for precise product, comprise that three layers of extrusion blow-molded bonded assembly film constitute, and promptly high-ductility layer, air-retaining liner and anti-oxidant internal layer constitute.Every layer thickness 0.03-0.10mm of film, gross thickness is 0.1-0.3mm, the high-ductility layer is to select the poly-vinyl resin with higher-strength for use, preferably adopts linear low density polyethylene resin LLDPE.Air-retaining liner preferably adopts high-density polyethylene resin or metallocene ldpe resin, and anti oxidation layer is the antioxidant that adds 0.1-5% in various polyethylenes, especially linear polyethylene.Especially add the antioxidant of 0.5-5%, better scheme is to add antioxidant phosphite ester or the phosphinate (weight ratio) of 1-2.5%.
Said high-ductility layer also can be selected from high density polyethylene, metallocene low density polyethylene (LDPE), strengthen one of polyethylene, ultra-high molecular weight polyethylene.
For example adopting mol wt is 200000～250000 high density polyethylene (HDPE); Mol wt is 160000～180000 the poly-low density ethylene of metallocene; Mol wt is 350000～450000 enhancing polyethylene; Mol wt is the ultra-high molecular weight polyethylene more than 1000000.Especially adopt LLDPE, LLDPE ultra-strong polythene resin is that butylene or hexene and ethene are polymerized in Gas-phase reactor, and the characteristic of resin is typically implemented in fusion index and density.Fusion index can reflect the mean molecular weight of resin and controlled by temperature of reaction.Mean molecular weight and molecular weight distribution (MWD) are irrelevant.Density is by the concentration decision of comonomer in Polyethylene Chain.The physical property of LLDPE is controlled by its mol wt, MWD and density.Structurally, different with LDPE on the number of side chain and the type, LDPE has long-chain branch, and linear LDPE only has short-chain branch.LLDPE is only different with HDPE on the short-chain branch number.The short-chain branch number of HDPE is less, therefore, is that more highdensity material is arranged.LLDPE is better than LDPE, and with the stronger product of LLDPE production rigidity, to the low density material standard, the density of LLDPE and LDPE is generally all between 0.91-0.925 according to ATSM in all are used.Preferential adopt density greater than 0.925 better.
LLDPE forms higher crystalline texture, because there is not long-chain branch.The crystallinity that LLDPE is bigger produces the product of high stiffness.This higher crystallinity also makes LLDPE compare with LDPE, and fusing point has improved 10～15 ℃.Higher anti-to stretch intensity, penetration-resistant, tear resistance and percentage elongation increase be the characteristic of LLDPE, makes it be specially adapted to made membrane.Also can obtain bigger improvement if replace butylene to make comonomer even anti-impact force and tear resistance with hexene or octene.For the given resin under the same melt exponential sum density, hexene and octene LLDPE resin bring up to 300% on impact and tear resistance.The longer side chain of hexene and octene resin plays the effect as " knot " molecule between chain, improved the toughness of cmpd.
To have particular performances with cycloolefin metal derivative (metallocene) Catalyst Production resin.Narrower MWD has improved comonomer distribution, and better film clarity, leak tightness and strength under shock are arranged, and these are similar to the LLDPE with ziegler produced.Therefore, to select the LLDPE resin for use be fabulous scheme in the present invention.
Air-retaining liner preferentially adopts high density polyethylene, and especially percentage by weight is that the low density polyethylene (LDPE) compound of 30～40% metallocene ldpe resin, 30～40% linear low density polyethylenes and 20～40% is better.Can also add auxiliary antioxidant: single phenol, bis-phenol, triphenol, polyphenol, hydroquinones or thiobisphenol, be used in combination with phosphorous acid lipid or phosphonous acid lipid antioxidant, addition is the 0.3-2% weight ratio in linear polyethylene; Phosphite ester or phosphonous acid fat and every kind of antioxidant of auxiliary antioxidant account for the weight of 20-80% respectively.Also can assist in thioesters class, monothioester (AT-245) antioxidant.
Especially phosphite ester (as Pentaerythritols diphosphites antioxidant) also can add the small amounts of inorganic deoxidation compound: as rongalite, sodium hydrosulfite and sodium thiosulphate.Auxiliary antioxidant and primary antioxidant and usefulness are to produce synergy, the usefulness that prolongs antioxidant.
As adopting two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites, general consumption is the weight ratio of 0.5%-2.5%, described phosphite ester kind antioxidant, with auxiliary antioxidant 1010 and 1076 etc. and time spent fabulous cooperative effect is arranged.Ratio of the present invention is weight ratio.Antioxidant 1010 and 1076 addition are the weight ratio of 0.3-0.8%.
Auxiliary antioxidant such as phosphite ester and hindered phenol antioxygen (comprising alkyl list phenolic antioxidant, alkyl Polyphenols antioxidant, thiobisphenol) synergy,, all effect preferably arranged.Adding proportion is the same, and phosphinate is identical with the mechanism and the character of phosphite ester.
Characteristics of the present invention are: the inner layer material of the rust prevention packaging that takes the lead in phosphorous acid lipid or phosphinate are applied to; itself there are volatility reducing substances or atmosphere to protect packaged product; can reduce peroxide rapidly; self change positive phosphite ester: P (OR) 3+ROOH → OP (OR) 3+ROH into; the present invention can be used for airtight antirust packing film for precise product with n-nonyl benzene diphosphites etc.; adopt known upper blowing method to be prepared (also can adopt the hydrostomia method), through multi-layer co-extruded once-combined moulding.The present invention has higher mechanical strength and toughness, and pulling strengrth is greater than 30MPa, good air-tightness.Anti oxidation layer places internal layer, and protection packaging article is anti-oxidant, can breakage is not lost impaired because of collision in the transportation.Actual detected shows, can not detect peroxide such as any ozone in the packaging bag, and always have finite concentration to be detected in the air.
The specific embodiment
Airtight antirust packing film for precise product of the present invention comprises that three-layer co-extruded bonded assembly film constitutes, and high-ductility layer, air-retaining liner and anti oxidation layer constitute.Every layer thickness 0.06-0.1mm of high-ductility layer film, air-retaining liner and antioxygen 0.03-0.06mm gross thickness are that 0.15-0.25mm is better.The high-ductility layer preferably adopts linear low density polyethylene resin LLDPE.It is the low density polyethylene (LDPE) compound of 30～40% metallocene ldpe resin, 30～40% linear low density polyethylenes and 20～40% that air-retaining liner adopts high density polyethylene, percentage by weight.
Anti oxidation layer is the antioxidant (also comprise and add auxiliary antioxidant) that adds 2.5% weight ratio in various polyethylenes, especially linear polyethylene.
Embodiment 1: the high-ductility layer adopts LLDPE, and LLDPE is by butylene or hexene and the ethene ultra-strong polythene resin that copolymerization forms in Gas-phase reactor.Air-retaining liner preferably adopts high-density polyethylene resin, and anti oxidation layer adopts linear low density polyethylene to add 2.5% antioxidant.Antioxidant extremely many: as the film antioxidant NP0 of vapour Bagong department, 168 or (being HALS phosphite ester and HALS phosphinate) such as TNPP type, Irganox245; The complex type antioxidant that adopts mainly is Irganox 1010, Irganox1076, Cyanox1790 etc. (with the same Irgafos168 of hindered phenol, Ultranox626 phosphite ester compound).Or the Cyanox 1790 of employing ACC company etc.Use in the above-mentioned antioxidant packages pack and all do not detect ozone.
Can also add auxiliary antioxidant comprises: single phenol, bis-phenol, triphenol, polyphenol, hydroquinones, thiobisphenol are used in combination with phosphorous acid lipid or phosphonous acid lipid antioxidant, and addition is 2.5% weight ratio in the linear polyethylene.Every kind of antioxidant of phosphite ester and auxiliary antioxidant accounts for the weight of 30-70% respectively.
As adopting the compound uses of auxiliary antioxidants such as phenols such as antioxidant SK-626, two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites and antioxidant AT-10, pentaerythritol diphosphites is 0.8% or 1.3% weight ratio at the PE consumption.The consumption of AT-10 is 1% weight ratio.
Perhaps can add KY-586 or KY-L390, different WeiCNa or dimension E, addition is the antioxidant of 1% weight ratio.Testing result is as follows: pulling strengrth: 33.6MPa, breaking elongation: 480%.Do not detect ozone.
Embodiment 2: add the type antidim compound in can adding in addition on the basis of embodiment 1, join in the resin partial esterification thing of aliphatic acid and polyalcohol when batching.General consumption 1～1.5% weight ratio in polyethylene.Polyalcohol commonly used is glycerine, D-sorbite and acid anhydrides thereof, aliphatic acid commonly used be the fatty acid ester of the saturated acid of C11, C12 or unsaturated acid, polyalcohol with the epoxyethane addition, can improve wetting ability, antifog property of increase initial stage and the antifog property of low temperature.Glycerin mono-fatty acid ester, the general consumption in polyethylene are 1% polyethylene oxide glyceryl monostearate.
Embodiment 3: on embodiment 1 or 2 bases, change the high-ductility layer material, adopt high density polyethylene (HDPE), be mixed with the antioxidant of 2% weight ratio.Effect is identical.
Embodiment 4: on embodiment 1 basis, change the air-retaining liner material, adopt ldpe resin, be mixed with the antioxidant of 1% weight ratio.Few ozone (in the air 20% of ozone content) can be detected.
Embodiment 6: the high-ductility layer adopts LLDPE ultra-strong polythene resin, and air-retaining liner also adopts high-density polyethylene resin, and anti oxidation layer adopts linear low density polyethylene to be mixed with the antioxidant (as embodiment 1) of 2% weight ratio.Testing result is as follows: pulling strengrth: 32MPa, breaking elongation: 380%.
Embodiment 7: the high-ductility layer adopts LLDPE ultra-strong polythene resin, and air-retaining liner also adopts high-density polyethylene resin, and anti oxidation layer adopts linear low density polyethylene to be mixed with the antioxidant (with embodiment 1) of 1% weight ratio.
Embodiment 8: the high-ductility layer adopts LLDPE ultra-strong polythene resin, and it is that 160000～180000 poly-low density ethylene of metallocene and mol wt are that 350000～450000 enhancing polyethylene is mixed that air-retaining liner adopts mol wt, and every kind of composition weight accounts for 50% respectively.Anti oxidation layer adopts linear low density polyethylene, is mixed with the antioxidant of 2% weight ratio, with embodiment 1, and on its basis, adds the inorganic reducing agent of 1% weight ratio: as rongalite, sodium hydrosulfite or sodium thiosulphate.Auxiliary antioxidant and primary antioxidant and usefulness are to produce synergy, the usefulness of the prolongation antioxidant of protection packed article.Air-tightness meets quality loop, and pulling strengrth is greater than 30MPa.Can distribute uniform deoxidation compound.
Anti oxidation layer generally all adopts various linear low density polyethylene resins all can at the foregoing description.
Embodiment 9: high-ductility hdpe layer mol wt is 210000; Also can be that mol wt is 160000～180000 the poly-low density ethylene of metallocene; Mol wt is 350000～450000 enhancing polyethylene; Mol wt is the ultra-high molecular weight polyethylene more than 1000000.The thickness of high-ductility layer is 0.10mm.The thickness of air-retaining liner is 0.03mm.The employing mol wt is 160000 metallocene ldpe resin.
Anti oxidation layer adopts linear low density polyethylene to be mixed with the antioxidant of 1% weight ratio one of the following: then effect is all not as previous embodiment.
(β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid) pentaerythritol ester
Antioxidant SK-1076, the β-positive octadecanol ester of (4-hydroxy phenyl-3,5-di-t-butyl) propionic acid
Antioxidant β (3, the 5-di-tert-butyl-hydroxy phenyl) methyl propionate
Antioxidant SK-1098, N, N '-1,6-hexylidene-two [3-(3, the 5-di-tert-butyl-hydroxy phenyl) propionamide]
Antioxidant SK-1 024, N, N '-two [3-(3, the 5-di-tert-butyl-hydroxy phenyl) propionyl] hydrazine.
Antioxidant SK-702, methylene bis (2,6 di t butyl phenol)
Claims (10)
1, airtight antirust packing film for precise product is characterized in that comprising that three layers of extrusion blow-molded bonded assembly high-ductility layer, air-retaining liner and anti-oxidant internal layer constitute; Every layer thickness of film is 0.03-0.10mm, gross thickness is 0.1-0.3mm, the high-ductility layer is selected from LLDPE, high density polyethylene, metallocene low density polyethylene (LDPE), strengthens one of polyethylene or ultra-high molecular weight polyethylene, and it is that 350000～450000 enhancing polyethylene or mol wt are the ultra-high molecular weight polyethylene more than 1000000 that air-retaining liner preferably adopts high-density polyethylene resin or metallocene ldpe resin, mol wt; Anti oxidation layer is the antioxidant that adds the 0.1-5% weight ratio in polyethylene or linear polyethylene.
2,, it is characterized in that described anti oxidation layer is the antioxidant that adds the 0.5-5% weight ratio in the linear polyethylene by the described airtight antirust packing film for precise product of claim 1.
3, by the described airtight antirust packing film for precise product of claim 1, the antioxidant that it is characterized in that described interpolation is the 1-2.5% weight ratio, and antioxidant is phosphite ester or phosphinate.
4, by the described airtight antirust packing film for precise product of claim 3, it is characterized in that adding auxiliary antioxidant: single phenol, bis-phenol, triphenol, polyphenol, hydroquinones or thiobisphenol, be used in combination with phosphorous acid lipid or phosphonous acid lipid antioxidant, addition is the 0.3-2% weight ratio in linear polyethylene; Phosphite ester or phosphonous acid fat and every kind of antioxidant of auxiliary antioxidant account for the weight of 20-80% respectively.
5,, it is characterized in that high-ductility layer LLDPE is density greater than 0.925 LLDPE by the described airtight antirust packing film for precise product of claim 1.
6,, it is characterized in that it is the low density polyethylene (LDPE) compound of 30～40% metallocene ldpe resin, 30～40% linear low density polyethylenes and 20～40% that air-retaining liner adopts high density polyethylene or percentage by weight by the described airtight antirust packing film for precise product of claim 1.
7, by the described airtight antirust packing film for precise product of claim 4, it is characterized in that antioxidant SK-626, two (2.4-di-tert-butyl-phenyl) pentaerythritol diphosphites and the compound use of antioxidant AT-10 phenolic antioxidant, pentaerythritol diphosphites is 0.8% or 1.3% weight ratio at the PE consumption, and the consumption of AT-10 is 1% weight ratio.
8,, it is characterized in that especially adding the inorganic reducing agent of 1% weight ratio: rongalite, sodium hydrosulfite or sodium thiosulphate by the described airtight antirust packing film for precise product of claim 7.
9,, it is characterized in that especially also adding the different WeiCNa of organic reducing agent or the dimension E of 1% weight ratio by claim 1 or 2 described airtight antirust packing film for precise product.
10, by claim 2 or 4 described airtight antirust packing film for precise product, add the type antidim compound in it is characterized in that adding, addition is 1～1.5% weight ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100210620A CN100515879C (en) | 2007-03-23 | 2007-03-23 | Airtight antirust packing film for precise product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100210620A CN100515879C (en) | 2007-03-23 | 2007-03-23 | Airtight antirust packing film for precise product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101020517A true CN101020517A (en) | 2007-08-22 |
| CN100515879C CN100515879C (en) | 2009-07-22 |
Family
ID=38708410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100210620A Expired - Fee Related CN100515879C (en) | 2007-03-23 | 2007-03-23 | Airtight antirust packing film for precise product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100515879C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787155A (en) * | 2010-03-16 | 2010-07-28 | 南阳金牛彩印集团有限公司 | Preparation method of stewing film for beverage packing |
| CN101717015B (en) * | 2009-11-17 | 2012-03-14 | 沈阳防锈包装材料有限责任公司 | Gas-phase rustproof packaging material and manufacturing method thereof |
| CN105778208A (en) * | 2016-03-10 | 2016-07-20 | 海宁长林包装材料有限公司 | Method for preparing high-blocking polyethylene film |
| CN111746085A (en) * | 2020-06-08 | 2020-10-09 | 安徽兴中新材料股份有限公司 | Antibacterial and antistatic film and preparation method thereof |
| CN114989518A (en) * | 2022-07-27 | 2022-09-02 | 新乐华宝塑料薄膜有限公司 | Biological polyethylene film and preparation method thereof |
-
2007
- 2007-03-23 CN CNB2007100210620A patent/CN100515879C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101717015B (en) * | 2009-11-17 | 2012-03-14 | 沈阳防锈包装材料有限责任公司 | Gas-phase rustproof packaging material and manufacturing method thereof |
| CN101787155A (en) * | 2010-03-16 | 2010-07-28 | 南阳金牛彩印集团有限公司 | Preparation method of stewing film for beverage packing |
| CN105778208A (en) * | 2016-03-10 | 2016-07-20 | 海宁长林包装材料有限公司 | Method for preparing high-blocking polyethylene film |
| CN111746085A (en) * | 2020-06-08 | 2020-10-09 | 安徽兴中新材料股份有限公司 | Antibacterial and antistatic film and preparation method thereof |
| CN114989518A (en) * | 2022-07-27 | 2022-09-02 | 新乐华宝塑料薄膜有限公司 | Biological polyethylene film and preparation method thereof |
| CN114989518B (en) * | 2022-07-27 | 2022-11-04 | 新乐华宝塑料薄膜有限公司 | Biological polyethylene film and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100515879C (en) | 2009-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10066093B2 (en) | Barrier film for food packaging | |
| US8809433B2 (en) | Barrier properties of substantially linear HDPE film with nucleating agents | |
| CN100515879C (en) | Airtight antirust packing film for precise product | |
| CN101868348A (en) | Multilayer barrier film | |
| CA2688092C (en) | Multilayer film structure | |
| US9127144B2 (en) | Polyolefin compositions for film, fiber and molded articles | |
| US10081720B2 (en) | Modified polypropylene compositions for reduced necking in extrusion film casting or extrusion coating processes | |
| CA2877564C (en) | Curl resistant barrier films | |
| KR100814984B1 (en) | Polyethylene resin composition | |
| CN104844916A (en) | Enhanced polyethylene heat shrinkable film | |
| EP2918409B1 (en) | Stretch wrapping film | |
| JP2019119210A (en) | Film for stretch packaging | |
| JP6379739B2 (en) | High rigidity multilayer film | |
| KR102414015B1 (en) | Thermoplastic resin composition for film having excellent discoloration resistance and film using the same | |
| CA3179406A1 (en) | Polyethylene homopolymer compositions with balanced properties | |
| JPH0267345A (en) | Polyethylene resin composition and film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuxi Huamei elevator decoration Co., Ltd. Assignor: Wang Jingda Contract record no.: 2011320000179 Denomination of invention: Airtight antirust packing film for precise product Granted publication date: 20090722 License type: Exclusive License Open date: 20070822 Record date: 20110308 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20130323 |