WO2002055300A1 - Laminates and methods for manufacturing the same - Google Patents

Laminates and methods for manufacturing the same Download PDF

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Publication number
WO2002055300A1
WO2002055300A1 PCT/GB2002/000036 GB0200036W WO02055300A1 WO 2002055300 A1 WO2002055300 A1 WO 2002055300A1 GB 0200036 W GB0200036 W GB 0200036W WO 02055300 A1 WO02055300 A1 WO 02055300A1
Authority
WO
WIPO (PCT)
Prior art keywords
laminate
layer
sealable
pressure sensitive
sensitive adhesive
Prior art date
Application number
PCT/GB2002/000036
Other languages
French (fr)
Inventor
Abdul Aziz Okhai
Original Assignee
Abdul Aziz Okhai
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 Abdul Aziz Okhai filed Critical Abdul Aziz Okhai
Publication of WO2002055300A1 publication Critical patent/WO2002055300A1/en

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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
    • B32B27/32—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
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers

Definitions

  • the present invention relates to laminates and to a method for their manufacture.
  • the invention relates to a laminate for use in forming resealable packaging.
  • resealable packaging Some incorporate mechanical means for resealing, such as zippers.
  • Other types of resealable packaging comprise laminates that include pressure sensitive adhesive layers, such adhesive allowing sealed packaging to be opened and then closed and resealed.
  • a commonly used resealable packaging material uses a laminate comprising a pressure sensitive adhesive layer sandwiched between a substrate layer comprising, for example, a polyester film and a sealable polythene layer.
  • the polythene layer of this laminate can be heat-sealed to a structure that is also made of polythene, such as a container or tray.
  • the above described laminate is folded and the polythene layer is heat-sealed to itself to form a bag.
  • the laminate In operation, in order to open packaging sealed using the laminate, the laminate is peeled away from rest of the packaging. This peeling action causes the layers making up the laminate to become separated.
  • the sealable polythene layer remains attached to the rest of the packaging, thereby exposing the pressure sensitive adhesive layer which remains attached to the substrate layer.
  • the exposed pressure sensitive adhesive layer can subsequently be reattached to the sealable film, thereby resealing the packaging.
  • the sealable polythene layer has to be thin, preferably within the range of 15 to 20 microns. This allows the layer to be easily separated from the pressure sensitive adhesive layer upon opening the packaging.
  • the polythene sealable layer tends to delaminate and cracks form on the film as it is separated from the pressure sensitive adhesive. These cracks are called “piping” and this is where narrow areas of the film delaminate forming "pipes" of between 0.25 to 4 mm diameter between the polythene and the pressure sensitive adhesive. This is detrimental to the desired resealing function of the laminate and is clearly not acceptable.
  • the current invention seeks to provide a solution to this problem without the use of thicker polythene films in the laminate.
  • a laminate for use in packaging comprising a layer of pressure sensitive adhesive sandwiched between a substrate layer and a sealable layer, wherein the sealable layer comprises polypropylene and is sealable to other packaging material or itself.
  • the polypropylene is a homo-polymer, a co-polymer or a metalocene polymer of either type.
  • the laminates according to the first aspect of the present invention do not suffer from the disadvantages experienced with known laminates having a polythene sealable layer.
  • the polypropylene sealable layer has a high adhesion to the pressure sensitive adhesive and does not allow cracks or pipes to form in the laminate.
  • a laminate according to the present invention can have a sealable layer with a thickness of 50 microns or less.
  • the sealable layer is made up of just polypropylene
  • the laminate can be fused to polypropylene materials, such as polypropylene containers.
  • polypropylene materials such as polypropylene containers.
  • the sealable layer comprises a coextrusion with at least 2 layers, the layer adjacent the pressure sensitive adhesive being polypropylene. The material at the exposed side of the sealable layer will be selected for its ability to fuse to whatever material the laminate is to be fused to.
  • a laminate which is to be fused to a polythene container, may include a sealable layer comprising polypropylene, a mixture of polypropylene and polythene, and then polythene.
  • the polythene may be selected from the group consisting of LDPE, MDPE, LLDPE, LMDPE, NLLDPE and Metalocene PE.
  • the coextrusion could comprise polypropylene, a mixture of polypropylene and a plastomer, and then the plastomer.
  • the plastomer is Exxon Exact® or Dow Afinity®.
  • the laminate according to the present invention may be desirable for the laminate according to the present invention to have the pressure sensitive adhesive layer and sealable layer overlaying only a portion of the substrate layer.
  • a laminate could be used wherein the pressure sensitive adhesive and sealable layers are only present in those regions within which the laminate is to contact and be fused to the container.
  • the substrate layer of the laminate has barrier properties.
  • the substrate layer could prevent egress of liquids from one side of the laminate to the other, or it could be impervious to microbes.
  • the substrate layer might be made from polyester, nylon or polypropylene, paper, cellophane or other plastic film.
  • the laminate according to the first aspect of the invention is manufactured using the following method. Firstly, the pressure sensitive adhesive layer is applied to the substrate layer, preferably by extrusion or hotmelt coating. Next, the sealable layer is applied to the pressure sensitive adhesive. This is preferably done by extrusion, hotmelt coating or solution coating.
  • the adhesion of a sealable layer to a pressure sensitive adhesive layer is improved by calendering the sealable layer in the conventional way once it has been applied to the layer of pressure sensitive adhesive.
  • the thickness of the sealable layer applied to the pressure sensitive adhesive is preferably between 3 and 40 microns.
  • the laminate according to the first aspect is used to form a sealable packaging.
  • this is done by fusing the laminate to a container to render said container sealable.
  • the laminate may be used to cover the opening of the container, the sealable layer being fused to the container material around the edges of the opening.
  • the laminate is peeled from the container, whereupon the sealable layer remains in contact with the container whilst the other layers of the laminate are peeled away. This means that the pressure sensitive adhesive becomes exposed and may be used to re-attach the laminate in its original position, sealing the container once again.
  • the laminate may be used to form a sealable bag.
  • two or more sheets of the laminate according to the first aspect of the invention are fused along their edges, the sealable layers of the laminates being arranged to he adjacent to one another so they can fuse together.
  • the laminates are pulled apart, so that they separate at one of the sealed edges. This results in the layers of one of the laminates separating to expose the pressure sensitive adhesive layer. This exposed adhesive layer may then be reattached to rest of other laminate, thereby resealing the bag.
  • Such a sealable bag may also be made from a single sheet of laminate, folded so that the sealable layers He next to one another and fused along the open edges.
  • Figure 1 shows a laminate wherein the sealable layer comprises polypropylene; and Figure 2 shows a laminate wherein the sealable layer comprises a triple coextrusion.
  • Figure 1 shows a cross-sectional view of the laminate 11, according to the present invention.
  • the pressure sensitive adhesive layer 13 is sandwiched between a substrate layer 12 and a polypropylene sealable layer 14.
  • the laminate 21 is made up of a substrate layer 22, a layer of pressure sensitive adhesive 23 and a sealable layer 24.
  • the sealable layer 24 is a coextrusion of polypropylene 25, a heat sealable polymer 27, such as polythene, selected to bond to packaging material and a mixture 26 of the polypropylene and the heat sealable polymer positioned between them.
  • the sealable layer 14 is heat-fused to the container material.
  • the laminate In order to open the container, the laminate is peeled from the container. This peeling action separates the sealable layer 14 from the rest of the laminate, thereby exposing the pressure sensitive layer 13 which remains attached to the substrate layer 12. This allows the container to be re-sealed, as the exposed pressure sensitive adhesive 13 can be re-attached to the sealable layer 14, returning the laminate to its original configuration, sealing the container.
  • the sealable layer 24 is heat-fused to the container material.
  • the laminate is peeled from the container. This peehng action separates the sealable layer 24, comprising the three layers 25, 26 and 27, from the rest of the laminate, thereby exposing the pressure sensitive layer 23 which remains attached to the substrate layer 22. This allows the container to be re-sealed, as the exposed pressure sensitive adhesive 23 can be re-attached to the sealable layer 24, returning the laminate to its original configuration, seahng the container.

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  • Wrappers (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention provides laminates for use in packaging, comprising a layer of pressure sensitive adhesive sandwiched between a substrate layer and a sealable layer, wherein the sealable layer comprises wholly or partly polypropylene and is sealable to other packaging material or itself.

Description

LAMINATES AND METHODS FOR MANUFACTURING THE SAME
The present invention relates to laminates and to a method for their manufacture. In particular, the invention relates to a laminate for use in forming resealable packaging.
Various types of resealable packaging are known. Some incorporate mechanical means for resealing, such as zippers. Other types of resealable packaging comprise laminates that include pressure sensitive adhesive layers, such adhesive allowing sealed packaging to be opened and then closed and resealed.
A commonly used resealable packaging material uses a laminate comprising a pressure sensitive adhesive layer sandwiched between a substrate layer comprising, for example, a polyester film and a sealable polythene layer. The polythene layer of this laminate can be heat-sealed to a structure that is also made of polythene, such as a container or tray. Alternatively, the above described laminate is folded and the polythene layer is heat-sealed to itself to form a bag.
In operation, in order to open packaging sealed using the laminate, the laminate is peeled away from rest of the packaging. This peeling action causes the layers making up the laminate to become separated. The sealable polythene layer remains attached to the rest of the packaging, thereby exposing the pressure sensitive adhesive layer which remains attached to the substrate layer. The exposed pressure sensitive adhesive layer can subsequently be reattached to the sealable film, thereby resealing the packaging.
However, there are problems associated with packaging comprising this type of known laminate. In order to make it easy to open and consumer friendly, the sealable polythene layer has to be thin, preferably within the range of 15 to 20 microns. This allows the layer to be easily separated from the pressure sensitive adhesive layer upon opening the packaging. However, when such a thin film is used, the polythene sealable layer tends to delaminate and cracks form on the film as it is separated from the pressure sensitive adhesive. These cracks are called "piping" and this is where narrow areas of the film delaminate forming "pipes" of between 0.25 to 4 mm diameter between the polythene and the pressure sensitive adhesive. This is detrimental to the desired resealing function of the laminate and is clearly not acceptable.
It has been attempted to overcome this problem by using a thicker layer of polythene, the layer being in the region of 40-50 microns thick. This increases the rigidity of the polythene so that it cannot convolute and form pipes or cracks in the packaging. However, the use of such a thicker layer of polythene in the laminate leads to other problems. The packaging formed from the laminate is much more difficult to open. Furthermore, the use of the thicker polythene layer requires special sealing dies to be installed on machines handling the laminate. In addition, making the polythene thicker may not actually solve the problem of the adhesion between the polythene and the pressure sensitive adhesive. The tendency for the polythene layer to delaminate still exists, frequently leading to packaging not being properly sealed so that it has a tendency to leak, especially during transit.
The current invention seeks to provide a solution to this problem without the use of thicker polythene films in the laminate.
In a first aspect of the present invention, there is provided a laminate for use in packaging comprising a layer of pressure sensitive adhesive sandwiched between a substrate layer and a sealable layer, wherein the sealable layer comprises polypropylene and is sealable to other packaging material or itself.
In a preferred embodiment, the polypropylene is a homo-polymer, a co-polymer or a metalocene polymer of either type.
The laminates according to the first aspect of the present invention do not suffer from the disadvantages experienced with known laminates having a polythene sealable layer. The polypropylene sealable layer has a high adhesion to the pressure sensitive adhesive and does not allow cracks or pipes to form in the laminate. Indeed, a laminate according to the present invention can have a sealable layer with a thickness of 50 microns or less.
Where the sealable layer is made up of just polypropylene, the laminate can be fused to polypropylene materials, such as polypropylene containers. However, such a laminate cannot be fused to some other materials, such as polythene. Therefore, in a further preferred embodiment, the sealable layer comprises a coextrusion with at least 2 layers, the layer adjacent the pressure sensitive adhesive being polypropylene. The material at the exposed side of the sealable layer will be selected for its ability to fuse to whatever material the laminate is to be fused to.
Thus, for example, a laminate, which is to be fused to a polythene container, may include a sealable layer comprising polypropylene, a mixture of polypropylene and polythene, and then polythene. The polythene may be selected from the group consisting of LDPE, MDPE, LLDPE, LMDPE, NLLDPE and Metalocene PE.
Alternatively, the coextrusion could comprise polypropylene, a mixture of polypropylene and a plastomer, and then the plastomer. Preferably, the plastomer is Exxon Exact® or Dow Afinity®.
In some situations, it may be desirable for the laminate according to the present invention to have the pressure sensitive adhesive layer and sealable layer overlaying only a portion of the substrate layer. Thus, for example, if the laminate is used to close an opening in a container, a laminate could be used wherein the pressure sensitive adhesive and sealable layers are only present in those regions within which the laminate is to contact and be fused to the container.
In a yet further preferred embodiment, the substrate layer of the laminate has barrier properties. For example, the substrate layer could prevent egress of liquids from one side of the laminate to the other, or it could be impervious to microbes. The substrate layer might be made from polyester, nylon or polypropylene, paper, cellophane or other plastic film. According to a second aspect of the invention, the laminate according to the first aspect of the invention is manufactured using the following method. Firstly, the pressure sensitive adhesive layer is applied to the substrate layer, preferably by extrusion or hotmelt coating. Next, the sealable layer is applied to the pressure sensitive adhesive. This is preferably done by extrusion, hotmelt coating or solution coating.
In a preferred embodiment, the adhesion of a sealable layer to a pressure sensitive adhesive layer is improved by calendering the sealable layer in the conventional way once it has been applied to the layer of pressure sensitive adhesive.
The thickness of the sealable layer applied to the pressure sensitive adhesive is preferably between 3 and 40 microns.
According to a third aspect of the present invention, the laminate according to the first aspect is used to form a sealable packaging. In one embodiment, this is done by fusing the laminate to a container to render said container sealable. In this embodiment, the laminate may be used to cover the opening of the container, the sealable layer being fused to the container material around the edges of the opening. When the container is to be opened, the laminate is peeled from the container, whereupon the sealable layer remains in contact with the container whilst the other layers of the laminate are peeled away. This means that the pressure sensitive adhesive becomes exposed and may be used to re-attach the laminate in its original position, sealing the container once again.
In an alternative embodiment, the laminate may be used to form a sealable bag. To do this, two or more sheets of the laminate according to the first aspect of the invention are fused along their edges, the sealable layers of the laminates being arranged to he adjacent to one another so they can fuse together. To open a sealable bag, the laminates are pulled apart, so that they separate at one of the sealed edges. This results in the layers of one of the laminates separating to expose the pressure sensitive adhesive layer. This exposed adhesive layer may then be reattached to rest of other laminate, thereby resealing the bag. Such a sealable bag may also be made from a single sheet of laminate, folded so that the sealable layers He next to one another and fused along the open edges.
In order that the first aspect of the invention may be better understood, two embodiments thereof will now be described by way of illustration only and with reference to the accompanying drawings, wherein:
Figure 1 shows a laminate wherein the sealable layer comprises polypropylene; and Figure 2 shows a laminate wherein the sealable layer comprises a triple coextrusion.
Figure 1 shows a cross-sectional view of the laminate 11, according to the present invention. The pressure sensitive adhesive layer 13 is sandwiched between a substrate layer 12 and a polypropylene sealable layer 14. In Figure 2, the laminate 21 is made up of a substrate layer 22, a layer of pressure sensitive adhesive 23 and a sealable layer 24. In this laminate, the sealable layer 24 is a coextrusion of polypropylene 25, a heat sealable polymer 27, such as polythene, selected to bond to packaging material and a mixture 26 of the polypropylene and the heat sealable polymer positioned between them.
When the laminate 11 is used to seal a container, the sealable layer 14 is heat-fused to the container material. In order to open the container, the laminate is peeled from the container. This peeling action separates the sealable layer 14 from the rest of the laminate, thereby exposing the pressure sensitive layer 13 which remains attached to the substrate layer 12. This allows the container to be re-sealed, as the exposed pressure sensitive adhesive 13 can be re-attached to the sealable layer 14, returning the laminate to its original configuration, sealing the container.
When the laminate 21 is used to seal a container, the sealable layer 24 is heat-fused to the container material. In order to open the container, the laminate is peeled from the container. This peehng action separates the sealable layer 24, comprising the three layers 25, 26 and 27, from the rest of the laminate, thereby exposing the pressure sensitive layer 23 which remains attached to the substrate layer 22. This allows the container to be re-sealed, as the exposed pressure sensitive adhesive 23 can be re-attached to the sealable layer 24, returning the laminate to its original configuration, seahng the container.

Claims

Claims
1. A laminate for use in packaging, comprising a layer of pressure sensitive adhesive sandwiched between a substrate layer and a sealable layer, wherein the sealable layer comprises polypropylene and is sealable to other packaging material or itself.
2. A laminate as claimed in claim 1, wherein the polypropylene is a homo- polymer, a co-polymer or a metalocene polymer of either type.
3. A laminate as claimed in either of the preceding claims, wherein the sealable layer has a thickness of 50 microns or less.
4. A laminate as claimed in any one of the preceding claims, wherein the sealable layer comprises a coextrusion with at least 2 layers, the layer adjacent the pressure sensitive adhesive being polypropylene.
5. A laminate as claimed in claim 4, wherein the coextrusion comprises polypropylene, polythene, and a mixture of polypropylene and polythene.
6. A laminate as claimed in claim 5, wherein the polythene is selected from the group consisting of LDPE, MDPE, LLDPE, LMDPE, NLLDPE and Metalocene PE.
7. A laminate as claimed in claim 4, wherein the coextrusion comprises polypropylene, a plastomer, and a mixture of polypropylene and the plastomer.
8. A laminate as claimed in claim 7, wherein the plastomer is Exxon Exact® or Dow Af ity®.
9. A laminate as claimed in any one of claims 4-8, wherein the sealable layer may be heat fused to polythene.
10. A laminate as claimed in any of the preceding claims, wherein the pressure sensitive adhesive layer and sealable layer overlay at least a portion of the substrate layer.
11. A laminate as claimed in any one of the preceding claims, wherein the substrate layer has barrier properties.
12. A laminate as claimed in claim 11, wherein the substrate layer prevents egress of liquids from one side of the laminate to the other.
13. A laminate as claimed in claim 11, wherein the substrate layer is impervious to microbes.
14. A laminate as claimed in any one of the preceding claims, wherein the substrate layer is made from polyester, nylon or polypropylene, paper, cellophane or other plastic film.
15. A method of forming a laminate as claimed in any one of the preceding claims, comprising:
(a) applying a pressure sensitive adhesive to a substrate layer;
(b) applying a sealable layer onto the pressure sensitive adhesive layer.
16. A method as claimed in claim 15, wherein the sealable layer is applied by extrusion, hotmelt coating or solution coating.
17. A method as claimed in either of claims 15 and 16, wherein the appHed sealable layer has a thickness of between 3 and 40 microns.
18. A method as claimed in any one of claims 15-17, wherein the pressure sensitive adhesive layer is appHed to the substrate layer by extrusion or hot melt coating.
19. A method as claimed in any one of claims 15-18, further comprising the step of calendering the sealable layer once it has been appHed to the pressure sensitive adhesive layer.
20. Use of a laminate as claimed in any one of claims 1-14 to form a sealable packaging.
21. A use as claimed in claim 20, wherein the laminate is fused to a container to render said container sealable.
22. A use as claimed in claim 20, wherein the laminate is fused to itself or another laminate to form a sealable bag.
23. A sealable container comprising a laminate as claimed in any one of claims 1- 14.
24. A sealable bag comprising a laminate as claimed in any one of claims 1-14.
25. A laminate as shown in the accompanying drawings.
PCT/GB2002/000036 2001-01-09 2002-01-07 Laminates and methods for manufacturing the same WO2002055300A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0100542.0 2001-01-09
GB0100542A GB2370808B (en) 2001-01-09 2001-01-09 Laminates and methods for manufacturing the same

Publications (1)

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WO2002055300A1 true WO2002055300A1 (en) 2002-07-18

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CN103203919A (en) * 2013-02-22 2013-07-17 浙江诚信包装材料有限公司 High-barrier semi-high temperature cooking liquid packaging material and packaging bag made of the same
CN105856764A (en) * 2016-04-06 2016-08-17 广东东立新材料科技有限公司 High-temperature-resisting and stretching-resisting coextruded film of light guide plate

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WO2008001768A1 (en) * 2006-06-27 2008-01-03 Idemitsu Unitech Co., Ltd. Laminated tape, package, and process for producing laminated tape
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EP2108507A1 (en) * 2008-04-07 2009-10-14 Danapak Flexibles A/S A method of making and using a sheet laminate
ES2585155T3 (en) * 2010-06-22 2018-09-27 Danapak Flexibles A/S A sheet, a manufacturing process and use of a sheet as a lid for packaging
CN106497445B (en) * 2016-11-09 2022-06-14 宁波启合新材料科技有限公司 Adhesive tape

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WO2012062317A1 (en) 2010-11-11 2012-05-18 Danapak Flexibles A/S A laminate for use in packages, a method of making a reclosable laminate and use thereof
RU2549405C2 (en) * 2010-11-11 2015-04-27 Данапак Флексиблс А/С Laminar material for packages, method of re-sealing laminar material production and its application
CN103203919A (en) * 2013-02-22 2013-07-17 浙江诚信包装材料有限公司 High-barrier semi-high temperature cooking liquid packaging material and packaging bag made of the same
CN105856764A (en) * 2016-04-06 2016-08-17 广东东立新材料科技有限公司 High-temperature-resisting and stretching-resisting coextruded film of light guide plate

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