WO2001070497A2 - Enveloppe de balles coextrudee - Google Patents

Enveloppe de balles coextrudee Download PDF

Info

Publication number
WO2001070497A2
WO2001070497A2 PCT/US2001/007451 US0107451W WO0170497A2 WO 2001070497 A2 WO2001070497 A2 WO 2001070497A2 US 0107451 W US0107451 W US 0107451W WO 0170497 A2 WO0170497 A2 WO 0170497A2
Authority
WO
WIPO (PCT)
Prior art keywords
wrap film
bale wrap
layer
extruded
bale
Prior art date
Application number
PCT/US2001/007451
Other languages
English (en)
Other versions
WO2001070497A3 (fr
Inventor
Jeffrey A. Middlesworth
Vi N. Schmidt
Original Assignee
Tredegar Film Products Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tredegar Film Products Corporation filed Critical Tredegar Film Products Corporation
Priority to AU2001243509A priority Critical patent/AU2001243509A1/en
Publication of WO2001070497A2 publication Critical patent/WO2001070497A2/fr
Publication of WO2001070497A3 publication Critical patent/WO2001070497A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/02—Layered products comprising a layer of synthetic resin in the form of fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material

Definitions

  • bale wrap an extruded thermoplastic bale wrap film
  • the bale wrap of the invention has a first layer having components with a low melting point and low Vicat softening point and a second layer having components with a relatively higher melting point and a relatively higher Vicat softening point to minimize the bale-to-bale blocking tendency of the bale wrap.
  • the overall melting point of the extruded bale wrap approximates that of the melting point of the better monolayer films currently known in the art.
  • raw rubber pieces (referred to as "crumbs") are passed from a reactor through a drying oven, and collected in a compression mold where they are compressed into bales generally in the range of 14"x28"x8".
  • the bales are then placed in large containers, such as cardboard boxes or metal crates ("shipping containers") that are sized to receive a number of the bales for storage and transport.
  • shipment containers such as cardboard boxes or metal crates
  • the bales are placed in the shipping container at elevated temperatures (120°- 210° F., 48° C-98°C), which can cause bale-to-bale sticking if the bales are in direct contact with each other.
  • elevated temperatures 120°- 210° F., 48° C-98°C
  • the sticking and cold flow of the rubber makes it difficult to remove individual bales from the shipping container. It is generally not practical to permit the bales to cool to room temperature before placing them in the containers because doing so slows the production process, thereby adversely affecting manufacturing economies. Exposure to elevated temperatures during storage and transit cause further sticking and cold flow.
  • Bale wrap film is applied by conventional in-line equipment to completely encapsulate or wrap the rubber bale after the drying and molding steps prior to being placed in the shipping container. The film prevents rubber-to-rubber contact and also resists the cold flow of the rubber.
  • the bales are typically boxed for shipment with the bales arranged within the shipping container in stacks that are multiple layers high. Typically, up to nine layers of the bales are stacked one on top of the other within the container, which results in high pressures on the bottom layers due to the weight of the bales acting on the bottom bale.
  • the bales may be 170 to 190° F at the time that they are baled.
  • the bales are normally still hot from the manufacturing process. Additionally, the bales may also be placed within the container in a compressed condition to save space. On arrival at the manufacturing location, the bales are removed from the container where the wrapped bales are then processed.
  • a bale wrap that possesses comparable DSC melting point and Vicat softening point characteristics, while exhibiting lower Reblock and Peel Force properties at elevated temperatures is desirable.
  • DSC Melt Point and Vicat softening properties should be comparable to existing bale wrap film so that the bale wrap may be incorporated into a homogeneous mixture of rubber and rubber compounding ingredients as is the current practice.
  • a bale wrap that exhibits lower Reblock and Peel Force properties at elevated temperatures would permit wrapped bales to be placed within containers at elevated temperatures. Such a bale wrap would allow a manufacturer to increase the rate of the manufacturer's production process and favorably impact manufacturing economies.
  • This invention relates to a thermoplastic film used primarily for wrapping bales of synthetic rubber, i.e. "bale wrap".
  • the bale wrap of the present invention is coextruded to provide a first layer having a low melting point and a second layer having a relatively higher melting point.
  • a bale wrap having a low melting point overall, i.e. for the bulk of the film, is desirable because a lower melting point improves the ability of the film to melt and for the film and the contents of the bale to be incorporated into a homogeneous mixture of rubber and rubber compounding ingredients.
  • the resulting homogeneous mixture is used to form homogeneous rubber compounds.
  • Low melting points result in short cycle times thereby maximizing the productivity of a production process.
  • bale wraps having a low melting point often result in a film that tears or becomes quite sticky when wrapping the hot rubber. When this occurs, the bales often stick to each other in a shipping container making it difficult to separate the bales. This condition is referred to in the industry as "blocking". It is desirable to have a bale wrap having an outside layer with a relatively higher melting point to prevent the wrapped bales from sticking to one another within a container.
  • Figure 1 is a schematic of an extrusion apparatus for making the co-extruded bale wrap of the present invention.
  • Figure 2 is a cross-sectional view of a prior art monolayer film.
  • Figure 3 is a cross-sectional view of a monolayer film having a 50-50 blend of plastomer and EVA with slip and anti-block material.
  • Figure 4 is a cross-sectional view of a co-extruded embodiment having a 50% of its thickness comprising plastomer and 50% EVA with slip and anti-block material.
  • Figure 5 is a cross-sectional view of a co-extruded embodiment having a 75% of its thickness comprising plastomer and 25% EVA with slip and anti-block material.
  • Figure 6 is a graphical representation of thermal analysis results from a thermal analysis conducted on the film of Figure 2.
  • Figure 7 is a graphical representation of thermal analysis results from a thermal analysis conducted on the film of Figure 3.
  • Figure 8 is a graphical representation of thermal analysis results from a thermal analysis conducted on the film of Figure 4.
  • Figure 9 is a graphical representation of thermal analysis results from a thermal analysis conducted on the film of Figure 5.
  • Figure 10 is a perspective view of a Reblock tester.
  • Figure 11 is a perspective view of a sample film of Figure 2, 3, 4, or 5 being folded and prepared for cutting prior to Reblock testing.
  • an extruder 1 heats material and forces the material through die 2.
  • the molten material solidifies to form a film 3 after contact with air.
  • the film 3 is guided by process rollers, such as roller 4, so that the film may be further treated if desired.
  • the extrusion process is well known to those skilled in the art.
  • One such process is described in United States patent 5,865,926, which is incorporated herein by reference.
  • An example of further treating of the film is corona treating one side of the film, which is schematically shown by device 5.
  • corona treating may be used to enhance the ability of the film surface to accept printing.
  • a further example of treating the film is embossing the film.
  • embossing may be useful to minimize blocking.
  • the film 3 is collected on take-up roll 6 for subsequent shipping.
  • a widely used prior art design is a mono-layer film 10 (Figure 2) having 88% metallocene catalyzed linear low density polyethylene "plastomer", 9% ethyl vinyl acetate “EVA” and 3% slip and anti-block concentrate.
  • the plastomer is available from Exxon as Exact 3027.
  • Exact 3027 has a melting temperature of 92 °C and Vicat softening point of 78 °C.
  • the EVA is available from Exxon-Mobil as LD 317.09.
  • LD 317.09 has a melting temperature of 104 °C and a Vicat softening point of 86 ° C.
  • the slip and anti-block concentrate is available from Ampacet as Amp 10568.
  • Amp 10568 is 75% EVA, 20% silica and 5% Erucamide. Properties for this film 10 are disclosed in TABLE 1 , below. Of particular note, this film exhibits a machine direction "MD" Elongation of 621%, which is greater than the requirement of 250% desired by industry.
  • the DSC Melt Point is 92.7 °C, as seen in the graph of thermal analysis results in Figure 6.
  • the Vicat softening point is 79.9 °C, which is approximate to the target softening point of 82 °C dictated by a typical manufacturer's process.
  • the ash remaining from the anti-block additive concentrate, e.g. silica is 6448 ppm, which is roughly equivalent to the target of 6000 ppm.
  • the Reblock at 170° F is 77.3g.
  • the Reblock at 190° F is greater than 214g, but may not be determined accurately due to exceeding an instrument's ability to read the forces.
  • the maximum measuring capability of the test equipment is approximately 214 g.
  • the Peel Force at 190 degrees is 95g. The Reblock and Peel Force is determined by the standard protocols discussed hereinafter.
  • the 208-03-01 material is a mono-layer structure 20 ( Figure 3) having 50% plastomer, 47% EVA and 3% slip and anti-block concentrate.
  • the plastomer component is preferably Exact 3027.
  • the EVA compound is preferably LD 317.09.
  • the slip and anti-block component is preferably Amp 10568. Properties for this film 20 are discussed in TABLE 1, below. Of particular note, the film 20 exhibits an MD elongation 418%, which is greater than the requirement of 250% imposed by industry.
  • the DSC Melt Point is 99.0°C, as seen in the graph of thermal analysis results in Figure 7.
  • the Vicat softening point is 81.1 °C, which is approximately the limit softening point of 82 °C.
  • the ash content remaining from the anti-block additive, e.g. silica is 5813 ppm, which is roughly equivalent to the target of 6000.
  • the Reblock at 190 deg F is 136.8g.
  • the 208-07-04 material is a co-extrusion 30 ( Figure 4) of two layers.
  • Layer A comprises approximately 50% of the total thickness of the co-extrusion.
  • Layer B comprises approximately 50% of the total thickness of the extrusion.
  • Layer A (having the higher melting point) is intended to be the outside layer of the film and is comprised of 97% EVA and 3% slip and anti-block concentrate.
  • the EVA is preferably LD317.09 and the slip and anti-block additive is preferably Amp 10568.
  • Layer B is intended to be the inside layer of the film 30 or the side contacting the rubber.
  • Layer B is preferably comprised of 97% plastomer and 3% slip and anti-block concentrate.
  • the plastomer is preferably Exact 3027 and the slip and anti-block additive is preferably Amp 10568.
  • Properties for this embodiment of the present invention are disclosed in TABLE 1, below. Of note, the embodiment exhibits an MD elongation of 331%, which is greater than the requirement of 250% elongation imposed by industry.
  • the composite DSC Melt Point for the film 30 is represented by a primary peak at 92.4°C and a small peak at 101.9°C as seen in the graph of thermal analysis result in Figure 8.
  • the Vicat softening point of the layered material is 81.0°C, which is approximately the target softening point of 82 °C.
  • the ash content remaining from the anti-block additive, e.g. silica is 5474 ppm, which is roughly the target of 6000.
  • Reblock at 190 deg F is 99.8g.
  • the Peel Force at 190 degrees is 7.6g.
  • the Reblock and Peel Force are determined in accordance with the standard protocol discussed hereinafter.
  • the 208-07-05 material 40 ( Figure 5) is an extrusion of two layers.
  • Layer A comprises 25% of the total thickness of the extrusion.
  • Layer B comprises 75% of the total thickness of the extrusion. It will be understood by those skilled in the art that the relative percentages of the thicknesses of the layers may be changed without departing from the scope of the invention.
  • Layer A is intended to be the outside layer of the film and is comprised of 97% EVA and 3% slip and anti-block concentrate.
  • the EVA is preferably LD302.32 and the slip and anti-block is preferably Amp 10568.
  • LD302.32 has a melt temperature of 104°C and a Vicat softening point of 89°C.
  • Layer B is intended to be the inside layer of the film or the side contacting the rubber.
  • Layer B is comprised of 97% plastomer and 3% slip and anti-block concentrate.
  • the plastomer as disclosed herein is the preferred material, it should be understood by those skilled in the art that any polyethylene with a melting point of less than 105°C may be used instead of or in combination with the plastomer disclosed herein.
  • the plastomer is preferably comprised of Exact 3027 and the slip and anti-block additive is Amp 10568. Properties for the preferred embodiment of the present invention are disclosed in TABLE 1 , below. Of interest is an MD Elongation of 472%, which is greater than the requirement of 250% imposed by industry.
  • Point for the film 40 is represented by a primary peak at 92.5 °C and a small peak at 102°C as seen in the graph of thermal analysis results in Figure 8.
  • the Vicat softening point of the layered material is 80.6 °C, which is roughly approximate to the target softening point of 82 °C.
  • the ash remaining from the anti-block additive content, e.g. silica, is 5289 ppm, which is roughly equivalent to the target of 6000 ppm.
  • the Reblock at 190 deg F is 74.4.
  • the Peel Force at 190 degrees is 5.9g. The Reblock and Peel Force are determined in accordance with standard protocol discussed hereinafter.
  • Both the 208-03-01 monolayer material 20 and the 208-07-04 layered material 30 have approximately 50% plastomer and approximately 50% EVA.
  • the Reblock force is substantially decreased as compared to the monolayer embodiment (208-07-01 ) at a testing temperature of 190 deg F.
  • the layered material exhibited 99.8 g resistence in a Reblock test compared to the 136.8 grams resistence in a Reblock test for monolayer film 20.
  • the layered material exhibited a Peel Force of 7.6 grams versus a Peel Force of 8.7 grams for the monolayer embodiment.
  • the Reblock and Peel Force may be further depressed.
  • film comprised of extruded metallocene and EVA in desired percentages.
  • the Melt Index may be determined by testing methods in accordance ASTM 1238, Condition E, 190°C, 2.16 kg mass, expressed in g/10 min.
  • the Vicat softening point for film may be determined by testing methods in accordance with ASTM Test Method D 1525.
  • the DSC Melt Point may be determined by testing methods in accordance with ASTM Test Method D 3418 - 82.
  • Reblocking results from storage of film or bags with prolonged contact of film layers. Stacks of bags stored in boxes under storehouse conditions, in shipment or on store shelves have a tendency to stick together. This adhesion is called Reblocking.
  • Reblock is measured as the force, in grams, necessary to separate two layers of film after aging at controlled temperature and pressure.
  • the KayenessTM Block - Reblock Tester is shown in Figure 10.
  • Tester 90 includes digital display A, on/off switch B, fuse C, leveling feet D, hold-down clamp E, manual return button F, magnetic clamp strips G, upper platen H 1 , lower platen H2, run test button I, and knurled tare knob J.
  • samples for testing by the Reblock Tester 90 should be prepared as follows:
  • Samples should be conditioned in the Lab a minimum of 48 hours prior to testing. 2.
  • a clean glass surface (Fig. 11), fold the film so that the surfaces 104 to be tested are in contact: for example, a corona treated side should be in contact with a corona treated side, an untreated side should be in contact with an untreated side, Layer A should be in contact with Layer A, Layer B should be in contact with Layer B, and with regard to embossed films the female to female or male to male side should be in contact, etc., as requested.
  • Film surfaces 104 should be clean and wrinkle free.
  • the Reblock weight is lifted off of the specimen stack and the specimen stack is removed from the oven. The specimens are allowed to cool for 1 hour before testing.
  • the Reblock tester 90 must be leveled and adjusted prior to testing. First, two magnetic clamp strips G are placed on the upper platen HI. Knurled tare knob J is adjusted until the upper platen HI is just kissing the lower platen H2. Then, the leveling feet D are adjusted until the upper platen HI lowers exactly onto lower platen H2.
  • the Reblock tester must be cycled several times “dry”. To "dry” run, the RUN TEST button I is pressed. This permits the circuitry to warm up and the bearings to lubricate in the Reblock tester. Magnetic clamp strips G should be in place on the upper platen HI during "dry" running.
  • the tested sample is then removed from the Reblock tester 90 and four more samples (total of 5) are tested. The load display for each is then recorded.
  • the ash test requires the following equipment: a microwave muffle furnace, ashing crucibles - either quartz fiber disposables or Coors porcelain crucibles, a scale sensitive to .0001 grams, heat resistant gloves, tongs (to handle crucibles), and a desiccator.
  • ashing standard PE, PP and materials not containing calcium carbonate is as follows:
  • the crucible/sample may be removed from the desiccator and weighed. This weight is then recorded.
  • the ppm of ash may be calculated as follows:
  • the Peel Test is conducted with 1 " wide strips of film cut from the samples prepared for the Reblock tester. The layers are separated on one end of the specimen strip. One layer is affixed to the upper jaw of an Instron, the second layer is affixed to the lower jaw of the Instron. The initial gap between the jaw grips is 2". The jaws are then separated to 2.2" and the resistance force is recorded. The jaws are then separated further to 2.5"and the resistance force is again recorded. The two force values are then averaged to obtain a Peel Force result.
  • a film designated as EMB-675 is a mono-layer structure having 88% plastomer, 9% EVA and 3% slip and anti-block concentrate, as previously discussed.
  • a second film is designated by 208-03-01 and is a mono-layer structure having 50% plastomer, 47% EVA and 3% slip and anti-block concentrate or approximately 50% plastomer and 50% EVA.
  • a third film is designated by 208-07-04 and is a co-extrusion of two layers. Layer A comprises 50% of the total thickness of the co-extrusion. Layer B comprises 50% of the total thickness of the extrusion.
  • Layer A (having the higher melting point) is intended to be the outside layer of the film and is comprised of 97% EVA and 3% slip and anti-block concentrate.
  • Layer B is intended to be the inside layer of the film or the side contacting the rubber.
  • Layer B is preferably comprised of 97% plastomer and 3% slip and anti -block concentrate, as previously discussed.
  • the fourth film is designated by 208-07-05 and is a an extrusion of two layers.
  • Layer A comprises 25% of the total thickness of the extrusion.
  • Layer B comprises 75% of the total thickness of the extrusion.
  • Layer A is intended to be the outside layer of the film and is comprised of 97% EVA and 3% slip and anti-block concentrate.
  • Layer B is intended to be the inside layer of the film or the side contacting the rubber.
  • Layer B is comprised of 97% plastomer and 3% slip and anti-block concentrate, as described in greater detail below.
  • the film of the invention provides numerous advantages. These advantages include a film possessing DSC melting point and Vicat Softening Point characteristics comparable to prior art films, while demonstrating highly desirable low Reblock and Peel Force properties comparable to existing films at a temperature that is only obtainable for comparable films at temperatures at least 20 °F lower. Therefore, manufacturers may increase their process speed. At increased process speeds, the bale wrap of the present invention may be applied to hotter bales without blocking. If prior art bale wrap is used, the manufacturer must invest in expensive equipment to cool the rubber pieces or crumbs prior to bale forming or slow the through put rate to allow the crumbs to cool to an acceptable level prior to wrapping.
  • Applicant's film allows for the higher process speeds since applicant's film is able to provide the desired Reblock and Peel Force properties at higher temperatures.
  • the comparable DSC Melt Point and Vicat Softening properties allow the bale wrap of the present invention to be incorporated into a homogeneous mixture of rubber and rubber compounding ingredients as is the current practice.

Abstract

L'invention concerne un film polymérique coextrudé servant à envelopper des balles de caoutchouc (enveloppe de balles). Cette enveloppe de balles comprend une première couche présentant un point de fusion bas et une seconde couche dont le point de fusion est relativement plus élevé. Dans l'ensemble, ladite enveloppe de balles présente un point de fusion bas, ce qui est préférable étant donné qu'un point de fusion moins élevé améliore l'aptitude du film à être intégré dans un mélange homogène de caoutchouc et d'ingrédients composant le caoutchouc. Les enveloppes de balles dont le point de fusion est bas impliquent généralement que le film se déchire ou colle facilement lors de l'enveloppement du caoutchouc chaud. Lorsque cela se produit, les balles risque de se coller les unes aux autres dans les conteneurs de transport, d'où la difficulté de les en dégager et de les séparer. Ce phénomène est appelé 'blocage'. L'enveloppe de balles de l'invention est coextrudée, ce qui permet d'obtenir un point de fusion bas composé tout en conservant une couche extérieure dont le point de fusion est relativement plus élevé. On évite ainsi le blocage de ces balles enveloppées.
PCT/US2001/007451 2000-03-17 2001-03-07 Enveloppe de balles coextrudee WO2001070497A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001243509A AU2001243509A1 (en) 2000-03-17 2001-03-07 Co-extruded bale wrap

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52741200A 2000-03-17 2000-03-17
US09/527,412 2000-03-17

Publications (2)

Publication Number Publication Date
WO2001070497A2 true WO2001070497A2 (fr) 2001-09-27
WO2001070497A3 WO2001070497A3 (fr) 2002-01-31

Family

ID=24101361

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/007451 WO2001070497A2 (fr) 2000-03-17 2001-03-07 Enveloppe de balles coextrudee

Country Status (2)

Country Link
AU (1) AU2001243509A1 (fr)
WO (1) WO2001070497A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015024052A1 (fr) * 2013-08-20 2015-02-26 Tama Plastic Industry Matériau d'enrubannage et procédé de fabrication de matières agricoles récoltées en balles
WO2017221041A1 (fr) * 2016-06-19 2017-12-28 Laskus Przemyslaw Marcin Films de polyoléfine multicouches moletés à utiliser comme intercalaires anti-adhésifs, ainsi que processus et ligne technologique pour les fabriquer
US10940985B2 (en) 2013-07-26 2021-03-09 Tama Plastic Industry Wrapping web assembly and wrapping method
US11905397B2 (en) 2017-08-23 2024-02-20 Dow Global Technologies Llc Compositions containing ethylene-based polymer and cycloolefin interpolymer, and films formed from the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206826A2 (fr) * 1985-06-25 1986-12-30 Kureha Kagaku Kogyo Kabushiki Kaisha Pellicule laminée thermorétractable et son utilisation
EP0385599A2 (fr) * 1989-02-13 1990-09-05 Exxon Chemical Patents Inc. Film et composition polymère pour ce film
US5272016A (en) * 1992-03-23 1993-12-21 Viskase Corporation Multilayer stretch/shrink film
EP0580377A1 (fr) * 1992-07-22 1994-01-26 Sumitomo Chemical Company, Limited Film stratifié en polymères d'éthylène pour envelopper
US5415905A (en) * 1993-09-29 1995-05-16 Exxon Chemical Patents Inc. Dispersible film
US5525659A (en) * 1993-09-08 1996-06-11 The Dow Chemical Company Batch inclusion packages
US5783270A (en) * 1993-04-30 1998-07-21 W. R. Grace & Co.-Conn. Packaging film, packages and methods for using them

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0206826A2 (fr) * 1985-06-25 1986-12-30 Kureha Kagaku Kogyo Kabushiki Kaisha Pellicule laminée thermorétractable et son utilisation
EP0385599A2 (fr) * 1989-02-13 1990-09-05 Exxon Chemical Patents Inc. Film et composition polymère pour ce film
US5272016A (en) * 1992-03-23 1993-12-21 Viskase Corporation Multilayer stretch/shrink film
EP0580377A1 (fr) * 1992-07-22 1994-01-26 Sumitomo Chemical Company, Limited Film stratifié en polymères d'éthylène pour envelopper
US5783270A (en) * 1993-04-30 1998-07-21 W. R. Grace & Co.-Conn. Packaging film, packages and methods for using them
US5525659A (en) * 1993-09-08 1996-06-11 The Dow Chemical Company Batch inclusion packages
US5415905A (en) * 1993-09-29 1995-05-16 Exxon Chemical Patents Inc. Dispersible film

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10940985B2 (en) 2013-07-26 2021-03-09 Tama Plastic Industry Wrapping web assembly and wrapping method
WO2015024052A1 (fr) * 2013-08-20 2015-02-26 Tama Plastic Industry Matériau d'enrubannage et procédé de fabrication de matières agricoles récoltées en balles
AU2014308544B2 (en) * 2013-08-20 2017-02-23 Tama group A wrapping material and method of manufacture for baled harvested agricultural materials
US10239278B2 (en) 2013-08-20 2019-03-26 Tama Plastic Industry Wrapping material and method of manufacture for baling materials
US10286625B2 (en) 2013-08-20 2019-05-14 Tama Plastic Industry Wrapping material and method of manufacture for baling materials
US10960639B2 (en) 2013-08-20 2021-03-30 Tama group Wrapping material and method of manufacturing for baling materials
WO2017221041A1 (fr) * 2016-06-19 2017-12-28 Laskus Przemyslaw Marcin Films de polyoléfine multicouches moletés à utiliser comme intercalaires anti-adhésifs, ainsi que processus et ligne technologique pour les fabriquer
US11905397B2 (en) 2017-08-23 2024-02-20 Dow Global Technologies Llc Compositions containing ethylene-based polymer and cycloolefin interpolymer, and films formed from the same

Also Published As

Publication number Publication date
WO2001070497A3 (fr) 2002-01-31
AU2001243509A1 (en) 2001-10-03

Similar Documents

Publication Publication Date Title
US5460861A (en) Multilayer stretch/shrink film
RU2490135C2 (ru) Многослойные пленки
KR100478377B1 (ko) 잘 균형된 특성 또는 개선된 인성을 갖는 수축 필름 및 그의제조 방법
WO2012106025A1 (fr) Films co-extrudés et procédés de fabrication de tels films
NO312904B1 (no) Multilags polyetylenfilm, fremgangsmåte for fremstilling og anvendelse av samme
US4848564A (en) Synthetic rubber bale wrap
UA86195C2 (uk) Упаковка, яка здатна закриватися повторно
US6420022B2 (en) Differential cling forage wrapping film; wrapped bale; method for producing differential cling film; and method for wrapping forage
CA2239549A1 (fr) Films de polyethylene a orientation biaxiale
CN107635877A (zh) 包括吸收性棉纸材料堆叠和包装的封装
CA1306593C (fr) Film transparent, en matiere plastique, comprenant du polyethylene basse densite
WO2001070497A2 (fr) Enveloppe de balles coextrudee
CN109969489B (zh) 包装
WO2007095027A2 (fr) Films a base d'un elastomere et d'une resine de polyolefine et procedes associes
JP2011201587A (ja) 易開封食品包装袋用積層フィルムおよび易開封食品包装袋
CN116396508A (zh) 制备可剥离密封层的方法
EP3963000A1 (fr) Films thermorétractables en polyéthylène
US20080063845A1 (en) Multilayer structures, uses and preparation thereof
JP7312493B2 (ja) Ｐｔｐブリスター包装材、これを含むｐｔｐブリスター包装体及びこれの製造方法
CN113752599A (zh) 一种食品包装用高温蒸煮膜及其制备方法
US20170197348A1 (en) Process for Producing Multilayer Film
JP2002178463A (ja) 包装方法および積層フィルム
GB2623426A (en) Film
US11891479B2 (en) Thermoformed packaging and methods of forming the same
WO2023228197A1 (fr) Film de formation de blister en pet

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ CZ DE DE DK DK DM DZ EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ CZ DE DE DK DK DM DZ EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP