EP4214052A1 - Knurled multilayer polyolefin films for use as antiadhesive interleaves, as well as process and technological line for manufacturing the same - Google Patents
Knurled multilayer polyolefin films for use as antiadhesive interleaves, as well as process and technological line for manufacturing the sameInfo
- Publication number
- EP4214052A1 EP4214052A1 EP16831510.9A EP16831510A EP4214052A1 EP 4214052 A1 EP4214052 A1 EP 4214052A1 EP 16831510 A EP16831510 A EP 16831510A EP 4214052 A1 EP4214052 A1 EP 4214052A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- layer
- knurled
- sleeve
- temperature
- 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.)
- Withdrawn
Links
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 60
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000000181 anti-adherent effect Effects 0.000 title claims abstract description 30
- 239000010410 layer Substances 0.000 claims abstract description 114
- 238000000071 blow moulding Methods 0.000 claims abstract description 24
- 238000005520 cutting process Methods 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract description 21
- 239000012790 adhesive layer Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000000155 melt Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 13
- 229920000642 polymer Polymers 0.000 claims description 12
- 229920001577 copolymer Polymers 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 239000000853 adhesive Substances 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 5
- 229920000034 Plastomer Polymers 0.000 claims description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 5
- 230000001747 exhibiting effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 2
- 238000010186 staining Methods 0.000 claims description 2
- 238000005266 casting Methods 0.000 abstract description 2
- 239000004698 Polyethylene Substances 0.000 description 15
- -1 polyethylene Polymers 0.000 description 13
- 229920000573 polyethylene Polymers 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000001046 green dye Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
-
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
- B32B2307/516—Oriented mono-axially
Definitions
- the present invention relates to knurled multi-layer polyolefin films for use as antiadhesive interleaves, in particular for rubber industry, and a process for manufacturing the same and technological line for implementing the method.
- Knurled multi-layer polyethylene films are the materials traditionally used for this purpose.
- the films have the following final characteristics: thickness of 40-180 ⁇ , width ranging from 50 to 2500 mm and density in the range 0,918-0,940 g/cm 3 .
- Knurling reduces the area of contact with the rubber compound remaining in contact with the both sides of the spacer, thus it facilitates its separation from the rubber compound web being targeted for further processing.
- patterns used for knurling usually: diamond, pyramid or line patterns.
- Polyethylene is a preferred material for antiadhesive interleaves due to its susceptibility to processing, its flexibility and good yield point parameter; it also has good mechanical properties.
- the films are used, in which individual layers consist of polyethylene with different molecular weights.
- the individual layers of the multi-layer film are sometimes modified by adding other polymers, such as for example polypropylene(s), and various additives, such as plasticizers, dyes, pigments, antistatic agents, release agents, and the like.
- spacers antiadhesive interleaves made of polyethylene films are disposable after a single use and as such the are post-production wastes, intended for disposal or recycling.
- the aim of the invention is to provide a multi-layer film of polyethylene antiadhesive interleaves for the rubber industry and not only capable of reducing weight polyethylene post- production wastes in the industry, but also to provide a process of manufacturing such a film, as well as the production line for carrying out the method.
- a multi-layer polyolefin film for use as antiadhesive interleaves for the rubber industry, in form of a knurled strip, according to the invention is characterized in that it is made of a 1-9 layer polyolefin sleeve with the inner adhesive layer, subjected to blocking after being formed by blow molding, uniaxially oriented in the longitudinal direction at temperature 70-120°C, of a thickness reduced in the range of 2-7,5 times to a final value of 25-100 ⁇ and knurled at a temperature above its softening point, after the prior uniaxial longitudinal orientation.
- the multi-layer polyolefin film according to the invention has preferably the inner adhesive layer which is made of a mixture having a Vicat temperature below 70°C and consisting of:
- the layers responsible for its mechanical properties are made of polymers and copolymers from the group of polyolefins having density of 0.900 g/cm 3 - 965 g/cm 3 .
- a variant of a multi-layer polyolefin film for use as antiadhesive interleaves for the rubber industry, in the form of a knurled strip, according to the invention is characterized in that the strip is obtained by cutting a 1-9 layer polyolefin sleeve formed by blow molding, uniaxially oriented in the longitudinal direction at temperature 70-120°C, of a thickness reduced in the range of 2-7,5 times to a final value of 25-100 ⁇ and knurled at a temperature above its softening point, after the prior uniaxial longitudinal orientation.
- the layers responsible for its mechanical properties are made of polymers and copolymers from the group of polyolefins having density of 0.900 g/cm 3 - 965 g/cm 3 .
- the invention covers also a process for manufacturing a multi-layer polyolefin film for use as antiadhesive interleaves for the rubber industry, in the form of a knurled strip, wherein streams of variety of different melted polyolefins are the co-extruded and subjected to blow molding to form a multi-layer polyolefin sleeve, and the resulting multi-layer strip is knurled at temperature above the softening points of the polyolefins used, which process according to the invention is characterized in that by blow molding a 1-9 layer polyolefin sleeve is formed by co- extrusion of different melted polyolefins, which sleeve is passed through nip rolls, and then subjected to unidirectional longitudinal orientation using a set of rollers of different temperatures and different speeds, till achieving at 70-120°C the film thickness reduction in the range of 2-7,5 times, from an initial value of 400-80 ⁇ , to
- the composition of the manufactured multi-layer film is controlled gravimetrically and the automatic interoperational control of thickness of the manufactured multi-layer film is carried out.
- polymers and copolymers from the group of polyolefins having density of 0.900 g/cm 3 - 965 g/cm 3 are used as a material for forming the layers responsible for the mechanical properties of the produced multilayer film.
- the film sleeve is produced, wherein the inner adhesive layer is made of a mixture having a Vicat temperature below 70°C and consisting of:
- the film is reheated to a temperature adjusted to the film composition, within the range of 70-120°C, by means of contacting the film with the heated rollers and then the thus heated film is directed to the heating rollers which rotate at different rotational speeds, and after reaching a reduction of thickness of the film in the range of from 1: 2 to 1: 7.5, the film is cooled from the temperature of orientation of the film to the ambient temperature.
- the film is subjected to longitudinal edge cutting, and cut edges are recycled to the stage of the preparation of the blow molding mixture.
- the two independent film strips uniaxially oriented in the longitudinal direction, resulting form the longitudinal edge cutting are wound on two large bales using a two-reel winder, which bales are then - directly or at any time thereafter, individually transferred to a separate knurling station to an unwinder reel of the knurling station and the film strip is reheated by a number of heated rolls and infrared heaters up to a softening temperature and then subjected to knurling to form knurled pattern according to the customer's request and the resulting knurled film is wound on bales using a winder and adjusting the number of current meters of the film on each bale to the customer's order.
- the present invention relates also to a technological line for manufacturing a multi-layer polyolefin film for use as antiadhesive interleaves for the rubber industry, in the form of a knurled strip, as described above, comprising:
- a winder which line is characterized in that between the system of nip rolls and the assembly for longitudinal edge cutting, there is an assembly for uniaxial longitudinal orientation comprising heating rollers which rotate at different rotational speeds and a system for cooling the film cooled from the temperature of orientation of the film to the ambient temperature.
- the technological line according to the invention is also characterized in that the assembly for uniaxial longitudinal orientation is the MDO unit.
- the technological line according to the invention preferably further comprises an assembly for gravimetric control of composition of the manufactured multi-layer film, as well as a device for automatic interoperation control of thickness of the manufactured multi-layer film.
- the film according to the present invention i.e. the film subjected to the uniaxial longitudinal orientation and having a thickness reduced 30-60% depending on the final destination, as compared with the polyolefin spacers currently used in the rubber industry, without loss of strength and other performance benefits.
- the film according to the invention is knurled, and the resulting pattern is designed to reduce the contact surface between the film and the rubber compound.
- the sleeve of the multi-layer film without blocking is directed to the assembly for longitudinal orientation, and after the step of uniaxial orientation, the longitudinally oriented sleeve of multi-layer film is separated in step of longitudinal edge cutting into two strips of longitudinally oriented film, which strips separately are directed to the knurling operation step, either immediately after separation or after winding on two separate shafts.
- the resulting knurled uniaxially longitudinally oriented multi-layer film is packaged according to customer's requirements. Due to the longitudinal orientation the knurled multi-layer film of the invention exhibits:
- the longitudinally oriented antiadhesive interleaves of knurled multilayer film of the present invention are thinner than conventional ones, which significantly reduces the amount of post-production wastes. It also means a corresponding reduction in the load of equipment for storage and handling the bales of extruded rubber, thus helping to reduce wear and extend the life of the equipment.
- Fig. 1 shows a block diagram of the method according to the invention
- Fig. 2 shows a production line A for the manufacturing of a knurled uniaxially longitudinally oriented blocked multi-layer film for use as antiadhesive interleaves for rubber industry, and
- Fig. 3 shows a production line B for the production of knurled uniaxially longitudinally oriented multi layered film for use as antiadhesive interleaves for rubber industry.
- Fig. 1 in the present invention there are carried out three main processes: extrusion of a film, uniaxial longitudinal orientation and knurling of the uniaxially longitudinally oriented film.
- the method further includes the auxiliary processes: gravimetric control of the composition of the produced film, and automatic interoperational control of the thickness of the film.
- the method may be implemented in two versions: a continuous production process (Line A, as shown in Fig. 2) or process with technological break before knurling operation (Line B shown in Fig. 3).
- the method of the present invention is adapted to the technological requirements associated with the use of a multi-layer polyolefin film in the form of a sleeve r2, with the adhesive inner layer (Fig. 2) that is subjected to blocking on the pulling nip rollers 3 that exert pressure to form a single strip of the multi-layer film.
- the production line used in this embodiment of the present invention is composed of an extruder 1, a head 2 for blowing of the extruded film to form a film sleeve rl_, the nip rollers 3, passing through which results in obtaining a single strip of the multi-layer film fz being directed to a MDO device 4 for effecting the uniaxial longitudinal orientation, and then the longitudinally oriented film fo is directed to the knurling assembly 5 integrated into the production line A.
- the knurled longitudinally oriented film mfo is received on a winder 6. Sections of the knurled longitudinally oriented film - according to the customer orders, are wound on separate bobbins.
- the advantage of this variant is producing the final knurled multi-layer film in a single production cycle.
- the line B shown in Fig. 3 is used for production, the line comprising an extruder 1, a head 2 for blowing the extruded film to form a film sleeve r2, the sleeve being unsusceptible to blocking, the nip rollers 3, passing through which results in obtaining a compressed sleeve of multi-layer film f in a form of strip, further directed to the MDO device 4 to undergo an uniaxial longitudinal orientation, and the longitudinally oriented film fo - after the operation of longitudinal edge cutting is in form of two separate strips of longitudinally oriented film fo which are directed to the two-reel winder 7a, 7b.
- a ready for dispatching knurled film according to the invention for use as antiadhesive interleaves (spacers) for the rubber industry, produced in accordance with the process according to the invention using the production lines A and B as shown in Fig. 2 and Fig. 3 is identical and has the same performance characteristics, irrespectively of the production variant.
- the present invention provides process for manufacturing a knurled multi-layer polyolefin film according to the invention, for use as antiadhesive interleaves for the rubber industry.
- streams of different melts of polyolefins, preferably polyethylene, sometimes modified with other polymers or other additives and ingredients of refining character are co-extruded and then subjected to blow molding to form a multi-layer film sleeve, which is passed through the pulling assembly of nip rollers.
- a multi-layer, including 1-9 layers, polyethylene film is obtained by using a device for the production of films by blow molding comprising the extruder 1 having a head 2, wherein the inner layer of the sleeve rl_ comprises very adhesive components, which are strongly susceptible to blocking, such as for example the acetate plastomer having a density less than 0.900 gm/cm 3 , EVA copolymers with a vinyl acetate content greater than 19% or lots more of the like materials.
- the materials susceptible to blocking should have a Vicat temperature below 70°C.
- the film sleeve, of which the inner layer has an adhesive component is squeezed by the pulling nip rolls 3 heated up to a temperature in the range 60-90°C and pressed with a pressure within the range of 3.0-7.5 bar, which results in blocking. In this way, after leaving the rolls 3 a single multi-layer strip fz - not the sleeve, is obtained.
- the thus blocked strip is submitted to longitudinal orientation.
- This process is carried out in the device 4 called MDO.
- This process involves reheating the film.
- the process of heating the film strip is carried out by contacting the material with the rollers, which are of suitable temperatures. Depending on the composition of the film rollers are heated to a temperature comprised between 70-120°C
- the thus heated film is passed in the device 4 to the next heating rollers rotating at different circumferential speed. Roller speed differences affect the rate of longitudinal orientation.
- the degree of orientation ranges from 1: 2 to 1: 7.5 depending on the desired final parameters of the film.
- the film fo is subjected to longitudinal edge cutting, i.e. the left and right side uneven edges of the tape are cut off, the cut material is recycled to step the preparation of melt for blow molding, and the central (middle) portion of the strip is subjected to heating by a number of heating rolls and infrared radiators, and then - when film is heated above the softening temperature, it is subjected to knurling operation, providing the knurled pattern according to the customer's order using the knurling assembly 5.
- longitudinal edge cutting i.e. the left and right side uneven edges of the tape are cut off
- the cut material is recycled to step the preparation of melt for blow molding
- the central (middle) portion of the strip is subjected to heating by a number of heating rolls and infrared radiators, and then - when film is heated above the softening temperature, it is subjected to knurling operation, providing the knurled pattern according to the customer's order using the knurling
- the resulting knurled film mfo is wound round bales of a winder 6, adjusting the amount of current meters of film on each bale to request of the customer, and then the bales are packed on pallets.
- the quality control in terms of uniformity, absence of air bubbles and mechanical damage is carried out.
- the thickness of the multi-layer film is controlled automatically at various stages of manufacturing process.
- composition of the coextruded individual layers of the multi-layer film is the composition of the coextruded individual layers of the multi-layer film
- FX1001 - LDPE - is responsible for the mechanical parameters
- Green 3011 - green dye Green 3011 - green dye.
- the film enters the MDO device 4 in the form of a sleeve r2 and after the longitudinal edge cutting operation the sleeve is split into two separate longitudinally uniaxially oriented multi-layer film strips fo.
- the knurling assembly 5 is not an integral part of the technological line B of the present invention, but is a separate knurling station, including rewinder 8, the knurling device 5 and winder 6 to wind the film.
- a multi-layered film is obtained by using a line for the production of films by blow molding.
- the outer and inner layers of the sleeve have the same composition as the outer layer in the first embodiment of the invention, i.e. the sleeve r2 has no internal adhesive layer to enable blocking.
- the temperature of the pulling nip rolls 3 is ca. 56°C, and the pressure is up to 5 bar.
- the film behaves according to standards, i.e. after passing through the pulling nip rolls 3 it has the form of a strip retaining the original form of a sleeve r2, and as such is directed on to the MDO device 4, while after longitudinal edge cutting operation it splits into two separate strips fo which are wound by the two-reel winder 7a, 7b on large bales.
- the so called jumbo rolls are transported to an unrolling device 8 of the knurling assembly 5 organized as a separate station.
- the knurling process and temperature parameters thereof are the same as in the first embodiment of the invention.
- the invention is further illustrated by the following examples, which specifically describes a process for manufacturing a knurled multi-layer polyethylene film for use as antiadhesive interleaves, in particular for the rubber industry. Comparative examples allow to assess the advantages of the inventive film.
- An apparatus for forming films by blowing LDPE material was supplied, which was processed at a temperature of 180-230°C. During the blowing sleeve was cooled with the air stream and reached a temperature in the range of 40-80°C prior to being directing the pulling (stretching) nip rollers.
- a multi-layer film was produced in the form of a sleeve, keeping the pinch rollers compression temperature to 56°C.
- the pre-stretched multi-layer film sleeve was obtained, which sleeve after cooling down and longitudinal edge cutting has been split into two separate multi-layer film strips which were wound onto a separate rolls.
- resulting oriented multi-layer film has undergone a process knurling.
- Samples of the film obtained under the first or second embodiment was subjected to the following quality tests: strength, tensile strength, elongation at break.
- Comparative film had a thickness of 100 microns and had embossed pattern identical to the film manufactured in accordance with the present invention. The results are summarized in Table 3
- the invention has been described in detail with reference to the polyolefin film produced in the form of a sleeve by blow molding.
- the same inventive concept can be successfully used in the production of multi-layer films of the knurled-layer film obtained by casting.
- the second embodiment of the invention it is possible to control one of the two distinct longitudinally uniaxially oriented multi-layer strips to the knurling device integrated into the production line, the second winding shaft - for later transfer to separate knurling device representing a separate processing station.
Landscapes
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IB2016/000861 WO2017221041A1 (en) | 2016-06-19 | 2016-06-19 | Knurled multilayer polyolefin films for use as antiadhesive interleaves, as well as process and technological line for manufacturing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4214052A1 true EP4214052A1 (en) | 2023-07-26 |
Family
ID=57890860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16831510.9A Withdrawn EP4214052A1 (en) | 2016-06-19 | 2016-06-19 | Knurled multilayer polyolefin films for use as antiadhesive interleaves, as well as process and technological line for manufacturing the same |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4214052A1 (en) |
WO (1) | WO2017221041A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113432941B (en) * | 2021-05-25 | 2022-07-05 | 天津大学 | Soil sample membrane loading device for soil-driven triaxial test |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1141515A (en) * | 1980-01-08 | 1983-02-22 | John H. Cleminson | Twin-web hot embossing of thermoplastic film |
US4407879A (en) * | 1981-08-07 | 1983-10-04 | Northern Petrochemical Company | Method of producing a textured film |
EP0385599A3 (en) * | 1989-02-13 | 1992-08-05 | Exxon Chemical Patents Inc. | Film and polymer composition for film |
US5182069A (en) * | 1991-01-04 | 1993-01-26 | Exxon Chemical Patents Inc. | Process for producing micropattern-embossed oriented elastomer films |
US5415905A (en) * | 1993-09-29 | 1995-05-16 | Exxon Chemical Patents Inc. | Dispersible film |
ES2185231T3 (en) * | 1997-11-04 | 2003-04-16 | Tredegar Film Prod Corp | MICROPOROUS TEXTURIZED STABLE DIMENSIONAL FILM AND MANUFACTURING METHOD. |
AU2001243509A1 (en) * | 2000-03-17 | 2001-10-03 | Tredegar Film Products Corporation | Co-extruded bale wrap |
-
2016
- 2016-06-19 EP EP16831510.9A patent/EP4214052A1/en not_active Withdrawn
- 2016-06-19 WO PCT/IB2016/000861 patent/WO2017221041A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2017221041A1 (en) | 2017-12-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20130161860A1 (en) | Oriented Film Produced In-Process For Use in the Stretch Film Market | |
CA2463766C (en) | Method for extrusion coating a lightweight web | |
CN102825884B (en) | Composite book type sterilizing film and production process thereof | |
WO2012062137A1 (en) | Multifunctional bopp cigarette packaging film and manufacturing method thereof | |
US8480836B2 (en) | Double-sided slip-resistant material and method of making same | |
JPH0220583A (en) | Production of reinforced tape and rib provided product | |
JP4650019B2 (en) | Polypropylene-based laminated film and package using the same | |
CA2536434A1 (en) | Process for the production of an oriented plastic film | |
US8632706B2 (en) | Self-adhered single-sided slip-resistant material | |
EP4214052A1 (en) | Knurled multilayer polyolefin films for use as antiadhesive interleaves, as well as process and technological line for manufacturing the same | |
US6656401B1 (en) | Method for extrusion coating multiple webs | |
CN116160745B (en) | Polypropylene film, preparation method thereof and thermal composite sheet | |
EP1019248B1 (en) | Method and apparatus for strip-coating a metallic strip-shaped substrate with a plastic band | |
US10000042B2 (en) | Tearable polystyrene film laminate for packaging and pouch purposes | |
CA2181056A1 (en) | Pressure sensitive adhesive tape | |
US20070122630A1 (en) | Co-extrusion or tandem extrusion of surface protection films | |
CN102123847A (en) | Heat treatment of thin polymer films | |
US7087136B2 (en) | Bonding unsintered non-expanded PTFE film to PTFE coated substrate | |
CN112829412A (en) | High-performance polypropylene aluminum-plated base film and preparation method thereof | |
CN112172291A (en) | Extinction transfer base film | |
CN118144393B (en) | Strippable and easy-to-print film for paper-plastic lamination and preparation method and application thereof | |
JP3573709B2 (en) | Method for manufacturing carrier tape and carrier tape | |
CN112959784B (en) | High-light-transmission heat-insulation ultraviolet-proof polyester film and preparation method thereof | |
JP4726353B2 (en) | Method for producing polyamide-based simultaneous biaxially stretched laminated film | |
CN105415824A (en) | High-quality BOPP thin film and production technology thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190121 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
18W | Application withdrawn |
Effective date: 20240115 |