EP2686153A1 - Partially crystallized polyester containers - Google Patents

Partially crystallized polyester containers

Info

Publication number
EP2686153A1
EP2686153A1 EP12708327.7A EP12708327A EP2686153A1 EP 2686153 A1 EP2686153 A1 EP 2686153A1 EP 12708327 A EP12708327 A EP 12708327A EP 2686153 A1 EP2686153 A1 EP 2686153A1
Authority
EP
European Patent Office
Prior art keywords
flange
container
polyester
container according
μιη
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Withdrawn
Application number
EP12708327.7A
Other languages
German (de)
French (fr)
Inventor
Eugenio Longo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faerch Pole Ltd
Original Assignee
Cryovac LLC
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 Cryovac LLC filed Critical Cryovac LLC
Priority to EP12708327.7A priority Critical patent/EP2686153A1/en
Publication of EP2686153A1 publication Critical patent/EP2686153A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • 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
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/04—Combined thermoforming and prestretching, e.g. biaxial stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2439/02—Open containers
    • B32B2439/06—Bags, sacks, sachets
    • 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
    • B65D2577/2025—Multi-layered container, e.g. laminated, coated

Definitions

  • a product support member i.e. a container or a tray
  • a cavity formed therein to accomodate the product and a flange around the perimeter of the member to be lidded, and the tray and the lid are not made by the same material causing recycling problems.
  • US 4,374,800 relates to a PAT (Polyalkylene terephthalate) container including a body portion of at least 20% of crystallinity, a flange having a crystallinity lower than that of the body, adjoined to the body portion.
  • PAT Polyalkylene terephthalate
  • polyesters such as, for example polyethylene terephthalate (PET), polylactic acid (PLA), polyethylene terephthalate - glycol (PETG).
  • the containers object of the present invention can be manufactured, for example, according to a process comprising the following steps:
  • the flange has a thickness ranging from 100 ⁇ to 1000 ⁇ , preferably from 200 ⁇ to 700 ⁇ , more preferably from 300 ⁇ to 600 ⁇ .
  • the second layer is made of 97% PETG Ramapet 9921W by Indorama and 3% of nucleating agent Tna S471 by Sukano ® and has a thickness of 320 ⁇ .
  • Sample 1 is tested in order to evaluate the variability of crystallinity and is tested after flange conditioning at different temperatures for different times.
  • the crystallinity of the flange is higher than the crystallinity of the container which is 2.45%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

A clear polyester container (1.0) comprising a base and upwardly extending side walls terminating in a continuous flange projecting from the side walls is described. Said multilayer container comprises an inner layer (1.1) in amorphous phase and an outer layer comprising a nucleating agent in the polymer composition in order to be crystallized in at least one portion of the flange.

Description

PARTIALLY CRYSTALLIZED POLYESTER CONTAINERS
The present invention relates to packages for products, preferably food products, comprising in particular clear polyester containers having a crystallized portion of the flange with good sealability to a top web.
The resultant package has a neat, clear appearance which is more attractive to the final consumer.
Commercially sold packages usually have a product support member, i.e. a container or a tray, with a cavity formed therein to accomodate the product and a flange around the perimeter of the member to be lidded, and the tray and the lid are not made by the same material causing recycling problems.
A generally known process to form a polyester tray includes extruding a polyester sheet in amorphous phase and subsequently crystallizing the whole tray by using a two stage mold, one hot for crystallization and the other cold for cooling down the article.
This kind of process results suitable to make mono-layer PET trays able to withstand the shrink of a lid without giving container distortion but the same process of crystallization makes the tray opaque and significantly reduces the rate of production due to thermoforming cycles.
State of the art
US 4,374,800 relates to a PAT (Polyalkylene terephthalate) container including a body portion of at least 20% of crystallinity, a flange having a crystallinity lower than that of the body, adjoined to the body portion.
EP 0 605 081 relates to a food package, comprising a crystalline opaque or colored tray thermoformed from a nucleated PET sheet which remains rigid at elevated temperature, and a transparent cover in an amorphous state connected to the tray.
GB 2 205 063 relates to a PET container having different degrees of crystallization in different regions of the article to ensure best functionality, the different degree of crystallization of the tray is obtained using a special mold at different heating region without using nucleating agents. US 2007/0082151 relates to a polyester container with a flange with a projecting portion, which exhibits low-temperature heat sealability.
There is still the need of a clear polyester container with a flange showing good sealability and with a sufficient mechanical resistance to withstand the shrink force exerted by a shrinking lid.
We have now found that a clear polyester container with a good sealability on the flange and good mechanical properties can be obtained by crystallizing only a portion of the flange. The resultant container remains transparent while increasing the rigidity of the flange which can withstand the shrink of the lid and shows good sealability.
Description of the invention
Therefore object of the present invention is a clear multilayer polyester container comprising a base and upwardly extending side walls terminating in a continuous flange projecting from the side walls, said multilayer container comprising at least an inner layer of an amorphous polyester and a bulk outer layer comprising a polyester in admixture with a nucleating agent, said bulk outer layer being crystallized in at least one portion of said flange.
For the purpose of the present invention the term "inner layer" means the layer of the container that will be in contact with the content of the container or in alternative that part of the container that comes in contact with the forming plug of the mold; in Figure 1 the "inner layer" is indicated by (1.1), the crystallized portion of the flange and the bulk outer layer are indicated by (1.2) and (1.3), respectively.
For the purpose of the present description and of the claims which follow, except where otherwise indicated, all numbers expressing amounts, quantities, percentages, and so forth, are to be understood as being modified in all instances by the term "about". Also, all ranges include any combination of the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein
A container according to the present invention wherein said bulk outer layer is continuosly crystallized all along the flange is particularly preferred.
In a preferred embodiment of the present invention the container is a double-layer or tri-layer container. In a double-layer container, the inner layer is in the amorphous phase and the crystallized portion of the flange is in the other outer layer. In a tri-layer container, the inner layer is in the amorphous phase and the crystallized portion of the flange is preferably in the intermediate bulk layer. In a tri-layer container according to the present invention the third outermost layer is preferably amorphous, being the nucleating agent preferably in the second layer. In the preferred embodiment only the portion of the bulk outer layer of the flange is crystallized while the other parts of the same, i.e. of the side walls and of the bottom part of the container, remain in amorphous phase, i.e. with a crystallinity percentage lower than 10%.
The polymers used in the present invention are clear amorphous thermoplastic polymers that can be injection molded or sheet extruded.
In particular the polymers used in the present application are polyesters, such as, for example polyethylene terephthalate (PET), polylactic acid (PLA), polyethylene terephthalate - glycol (PETG).
In a preferred embodiment the polymer used in the present invention is PET or PETG.
The inner layer remains amorphous during the crystallization of the flange so it can easily seal to a top lid using conventional sealing system, such as sealing bars. The bulk outer layer(s) comprising the nucleating agent can be crystallized in the flange part of the container, for example by using the mold showed in Figure 2.
The nucleating agent used to promote crystallization is contained in the bulk outer layer of the container and preferably only the flange portion is crystallized.
Examples of nucleating agents which can be used in the container according to the present application and nucleating agent known in the art and commercially available, are:
(i) alkali metal salts of organic acids, e.g. carboxylic acid; sodium, lithium, potassium benzoates (see D. Garcia, Heterogeneous nucleation of PET, J. of Polymer Science - Polymer physics edition, Vol 22, 2063-2072, 1984 and R. Legras, C. Bailly, M. Daumerie, V. Zichy and others, Chemical nucleation, a new concept applied to mechanism of action of organic acid salts on the crystallization of PET and bisphenol-A-polycarbonate, Polymer, Vol 25, 835-844, 1984) or sodium salts of substituted benzoic acids which contain at least one nitro, halogen, hydroxyl, phenyl or oxyphenyl substituent, and salts of alkali metals including phenolic, phosphonic, phosphinic and sulfonic (see EP 0 021 648);
(ii) lithium and/or sodium salts of aliphatic, cycloaliphatic, aromatic carboxylic acids or heterocyclic polycarboxilic acids, containing up to 20 carbon atoms (see US
3,761,450);
(iii) DBS-dibenzylidene sorbitol (see J. of Applied Polymer Science, Vol 36, 387-402,
1988);
(iv) trygliceride oil and triglyceride oil in combination with/or chemically bonding to organic acid metal salts (see US 5,356,972)
The nucleating agent preferably used in the present invention is commercially available as Tna S471 by Sukano®.
The amount of nucleating agent generally depends on the type of polyester used. According to the conventional practice, the nucleating agent is generally used in an amount of from 2% to 5%, more preferably from 2.5% to 4%, even more preferably of 3%.
Preferably the nucleating agents have a particle size not higher than 10 microns.
The containers object of the present invention can be manufactured, for example, according to a process comprising the following steps:
a) providing a multilayer polyester sheet comprising an inner amorphous polyester layer and a bulk outer layer comprising a polyester in admixture witha nucleating agent; b) pre-heating said multilayer polyester sheet at a temperature between 90° and 120 °C c) forming said preheated polyester sheet in a mold suitable for inducing crystallization of the bulk outer layer in at least one portion of the flange.
The crystallization of the flange is therefore selectively guaranteed by the heating provided on the flange using, for instance, a mold similar to the mold showed in Figure 2.
The heating can be provided using a mold at different heating zones in order to crystallize only a portion of the flange or preferably the entire flange. The percentage of crystallization in the bulk outer layer outside the flange remains lower than the percentage of crystallization of the flange or portions of the flange. The crystallization of flange may take place, preferably, in a forming mold but also outside a mold.
The percentage of crystallization of the flange or portion of the flange is equal to or higher than about 10%, preferably higher than 12%, more preferably higher than 15%. The crystallization of the flange takes place by heating the bulk outer layer generally at a temperature of from 270°C to 300°C, preferably at 275°C for a time comprised between 5 seconds and 10 seconds, preferably between 6 seconds and 8 seconds. The heat transfer takes place by conduction, induction or convection systems. The flange, after heating, can be cooled if needed.
The flange has a thickness ranging from 100 μιη to 1000 μιη, preferably from 200 μιη to 700 μιη, more preferably from 300 μιη to 600 μιη.
Furthermore the container object of the present invention, having the nucleating agent contained into the whole bulk outer layer, can also be crystallized if needed, in other portions but preferably only the flange is crystallized, thus providing the optical and mechanical properties needed i.e. more rigidity of the flange, transparency of the container and good sealability to the top lid.
The container of the present invention with the crystallized flange withstands the force imparted by the shrinking of lidding films and resists to deformations . However the present container is also suitable for tray lidding applications with non shrinkable films.
The container according to the present invention can be loaded with the product and then closed with a suitable top web by using a lidding machine which is characterized by a sealing bar operating at adequate temperature to get the seal. The temperature of the sealing bar depends on the type of lidding film used and the sealing operation can be carried out both under clean and contaminated conditions.
The packages so obtained, further object of the present invention, have a particulary good appearance. Moreover said packages, having the container and the lid the same polymeric composition, are really advantageous in the step of recycling. Furthermore it is possible to manufacture them by using recycled polyester. Examples
A three-layer container (sample 1) in which the flange has a total thickness of 520 μιη is formed using a mold as showed in Figure 2.
The inner layer is made of 100% PETG 6763 by Eastman Chemical and has a thickness of 100 μιη.
The second layer is made of 97% PETG Ramapet 9921W by Indorama and 3% of nucleating agent Tna S471 by Sukano ® and has a thickness of 320 μιη.
The third layer is made of 97% PETG Ramapet 9921W by Indorama and 3% of nucleating agent Tna S471 by Sukano ® and has a thickness of 100 μιη.
Sample 1 is tested in order to evaluate the variability of crystallinity and is tested after flange conditioning at different temperatures for different times.
The areas of the flange were selected and submitted to the thermal analysis that showed 12% of crystallinity, by conditioning the sample at 275 °C for 6 seconds.
The crystallinity of the flange is higher than the crystallinity of the container which is 2.45%.
Description of the drawings
Figure 1 represents a two layers container (1.0) according to the present invention.
The inner layer (1.1) is in the amorphous phase while the bulk outer layer has two portions at different degrees of crystallization: the area of the crystallized flange (1.2) and the remaining area of the polyester in the amorphous state (1.3).
Figure 2 represents the forming process used to provide the container according to the present invention.
The polyester film (2.1) is inserted into the female mold which comprises the cooled part
(2.3) and the heated part (2.2) where the crystallization of the flange occurs.
The polyester film (2.1) adheres to the female mold due to the vacuum applied (2.5), while the forming plug (2.4) pushes the polyester film (2.1) in the female mold, providing the final container.

Claims

A clear multilayer polyester container comprising a base and upwardly extending side walls terminating in a continuous flange projecting from the side walls, said multilayer container comprising at least an inner layer of an amorphous polyester and a bulk outer layer comprising a polyester in admixture with a nucleating agent, said bulk outer layer being crystallized in at least one portion of said flange.
The container according to claim 1 wherein said bulk outer layer is continuously crystallized all along the flange
The container according to claims 1 or 2 wherein the polyester is selected among polyethylene terephthalate, polylactic acid, and polyethylene terephthalate - glycol .
The container according to claim 3 wherein the polyester is polyethylene terephthalate or polyethylene terephthalate - glycol.
The container according to anyone of the preceding claims having two or three layers of polyester film.
The container according to anyone of the preceding claims wherein the layer thickness of the flange is from 100 μιη to 1000 μιη, preferably from 200 μιη to 700 μιη, even more preferably from 300 μιη to 600 μιη.
The container according to anyone of the preceding claims wherein the percentage of crystallization of the crystallized portion of the flange is equal to or higher than about 10%.
The container according to anyone of the preceding claims wherein the crystallization of the flange is obtained by heating at least one portion of said flange at a temperature of from 270°C to 300°C for a time from 5 seconds to 10 seconds preferably the crystallization of the flange is obtained by heating at least one portion of said flange at a temperature of 275°C for a time from 6 seconds to 8 seconds.
The container according to claim 1 wherein the nucleating agent is selected among alkali metal salts of organic acids; lithium or sodium salts of aliphatic, cycloaliphatic, aromatic carboxylic acids or heterocyclic polycarboxylic acids, containing up to 20 carbon atoms; DBS-Dibenzylidene Sorbitol; trygliceride oil and triglyceride oil in combination with organic acid metal salts or chemically bonding to organic metal salts.
10) A package comprising a container according to claims 1 to 9, a product loaded into said container and a lid sealed onto the flange of said container.
11) The package according to claim 10 wherein the container and the lid are made of polyesters.
12) The package according to claims 10 or 11 wherein said lid is made of a shrinkable film.
13) The package according to claims 10 to 12 having one or more films covering it
14) Use of a container according to claims 1 to 9 for tray lidding applications
15) A process for manufacturing a container according to claims 1 to 9, comprising the steps of:
a) providing a multilayer polyester sheet comprising an inner amorphous polyester layer and a bulk outer layer comprising a polyester in admixture with a nucleating agent;
b) pre-heating said multilayer polyester sheet at a temperature between 90 and 120 °C. c) forming said pre-heated polyester sheet in a mold suitable for inducing crystallization of the bulk outer layer in at least one portion of the flange.
EP12708327.7A 2011-03-15 2012-03-12 Partially crystallized polyester containers Withdrawn EP2686153A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12708327.7A EP2686153A1 (en) 2011-03-15 2012-03-12 Partially crystallized polyester containers

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP11158187 2011-03-15
EP12708327.7A EP2686153A1 (en) 2011-03-15 2012-03-12 Partially crystallized polyester containers
PCT/EP2012/054216 WO2012123391A1 (en) 2011-03-15 2012-03-12 Partially crystallized polyester containers

Publications (1)

Publication Number Publication Date
EP2686153A1 true EP2686153A1 (en) 2014-01-22

Family

ID=44650674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12708327.7A Withdrawn EP2686153A1 (en) 2011-03-15 2012-03-12 Partially crystallized polyester containers

Country Status (3)

Country Link
US (1) US20140001074A1 (en)
EP (1) EP2686153A1 (en)
WO (1) WO2012123391A1 (en)

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WO2019148201A1 (en) 2018-01-29 2019-08-01 Bard Access Systems, Inc. Connection system for establishing an electrical connection through a drape and methods thereof
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DK3747786T3 (en) * 2019-06-04 2022-07-11 Silver Plastics Gmbh & Co Kg PACKAGING TRAY WITH PROFILED SEALING EDGE
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