CN113195364A - Method for packaging particulate materials, pastes or gels - Google Patents
Method for packaging particulate materials, pastes or gels Download PDFInfo
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- CN113195364A CN113195364A CN201980081844.4A CN201980081844A CN113195364A CN 113195364 A CN113195364 A CN 113195364A CN 201980081844 A CN201980081844 A CN 201980081844A CN 113195364 A CN113195364 A CN 113195364A
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Abstract
The present invention relates to a method for packaging particulate material, paste or gel, said method comprising the steps of: (i) providing a rigid package having a bottom, a top and vertical walls, said rigid package being open at the top and comprising an adhesive layer on at least a portion of the inner bottom or inner vertical wall, (ii) filling the flexible package with a particulate material, a paste or a gel, (iii) bringing the filled flexible package into contact with the adhesive layer, thereby adhering the flexible package to the rigid package, (iv) closing the rigid package.
Description
The present invention relates to a method for packaging particulate materials, pastes or gels, more particularly solid industrial chemicals.
Many granular compounds, including pure solid peroxides, solid peroxide formulations and polymeric additives, are packaged in flexible packages such as (plastic) bags, which are then packaged in more rigid packages such as (cardboard or fiberboard) boxes or (fiber) drums. The bag is a primary package; the box or drum is a transport package.
Packaging techniques typically exhibit a wide range of performance requirements. Depending on the article to be packaged, the package must meet a wide variety of properties. In addition to the mechanical strength of the packaging material, the ease or strength of opening, the dispensing options (i.e. pouring, aspiration or removal) and the type of marking are also in constant technological development.
The field of retail packaging, particularly food packaging, focuses on the ease of sealing and dispensing packaged articles. Liquids are typically contained in plastic and glass jars, bottles and barrels, and plastic and paper bags including pockets, envelopes or stick packs.
WO 2017/135927 a1 for example mentions bag-in-box packages with a collapsed headspace. The package is used to provide a liquid or flowable product contained in a thermoplastic bag that is inserted or wrapped in an outer relatively rigid box or case. The package is equipped with an access port at the top of the box for insertion of a rigid tool, such as a straw, that pierces the thermoplastic bag to access the contents.
A completely different requirement is set up when packaging articles, which require authentication, for example for security reasons, hereinafter referred to as authenticated goods (certified foods). Authentication may be required, for example, for the reason that these items are hazardous. The way in which the item is accessed must be secure. The package must be labeled. The tags are associated with strict legal requirements.
The box disclosed in WO 2017/135927 a1 is not suitable for packaging certified articles, especially if the certified articles are presented as particulate materials, pastes or gels. Certified articles in these forms are usually poured out after removal of the sealing tape at the top of the package. In case the package according to the prior art provides an access port for the package, and in case the access port is punctured, the certified item may come into contact with air and moisture, which is harmful to the certified item or may even violate legal requirements. This type of packaging is not suitable for packaging certified goods.
The United Nations' Global consistent System of Classification and labeling and Chemicals (United Nations Global System of Classification and labeling of Chemicals) (GHS), implemented by the European Union under Regulation on Classification, labeling and Packaging of subsistions and regulations for substances and mixtures (CLP Regulation), requires information about the chemical content and safety on both the primary Packaging and the outside of the shipping package. GHS and CLP also require that the information be provided in the language of all countries/regions where the product is sold.
Once a product is reclassified, or the product is sold to a new country, or modified regulations require different or additional information, the entire inventory of preprinted bags must be replaced with new bags containing additional or modified information.
One potential solution to this problem is to manually mark the pouches rather than pre-printing them. However, this is a tedious job requiring employees to be able to understand the labels and the association with the product.
It is therefore an object of the present invention to provide a way of packaging certified articles that solves this problem.
The solution is provided by connecting the flexible package to the inside of the rigid package so that the combination package is considered as a primary package and only needs to be marked on the outside of the combination package.
Accordingly, the present invention relates to a method for packaging a particulate material, paste or gel, the method comprising the steps of:
-providing a rigid package having a bottom, a top and vertical walls, said rigid package being open at the top and comprising an adhesive layer on at least a part of the inner bottom or inner vertical wall,
-filling the flexible packaging with a particulate material, paste or gel,
-bringing the filled flexible package into contact with an adhesive layer, thereby adhering the flexible package to the rigid package,
-closing the rigid package, wherein the particulate material, paste or gel is a compound requiring GHS and/or CLP labeling.
The particulate material is preferably packaged. Accordingly, in a preferred embodiment, the present invention relates to a method for packaging particulate material, said method comprising the steps of:
-providing a rigid package having a bottom, a top and vertical walls, said rigid package being open at the top and comprising an adhesive layer on at least a part of the inner bottom or inner vertical wall,
-filling the flexible packaging with a particulate material,
-bringing the filled flexible package into contact with an adhesive layer, thereby adhering the flexible package to the rigid package,
-closing the rigid package, wherein the particulate material is a compound requiring GHS and/or CLP labeling.
Rigid package
The rigid package should be sufficiently rigid to maintain its shape during shipping, storage and handling.
The rigid package preferably has a cylindrical, cubic or rectangular parallelepiped shape.
The rigid package is preferably a box, drum, crate or tub.
The rigid package is preferably made of (corrugated) board, fibre board or plastic material.
The rigid package has a bottom, a top, and vertical walls. The vertical wall of a cuboid or cuboid shaped package consists of four side walls. The vertical wall of the cylindrical package is a cylindrical wall.
The inner bottom is the side of the bottom facing the inside of the package. The inner vertical wall is the side of the wall facing the inside of the package.
The method of the present invention begins with a rigid package that is opened at the top.
At the end of the process, the rigid package is closed, for example by folding and fastening (for example by glue or adhesive tape) the closing cover of the box or by placing a lid or cover.
Particulate materials, pastes or gels are industrial compounds. According to the invention, the particulate material, paste or gel is a compound requiring GHS and/or CLP labeling.
Flexible package
Flexible packaging is packaging filled with a particulate material, paste or gel. The flexible package preferably has the form of a bag, more preferably a plastic bag.
The plastic bag can be made of any plastic material suitable for making bags. One preferred material is polyethylene.
The plastic bag may have any suitable form. For example, it may be a square or round lined bag or a sleeve bag with a bottom seam (seem).
The outside bottom of the filled flexible package is defined as the portion of the pouch that contacts the inside bottom of the rigid package once placed inside the rigid package.
One-component adhesive
The adhesive layer present on the inside bottom or vertical wall of the rigid package may be a one-component adhesive.
The one-component adhesive is preferably a Pressure Sensitive Adhesive (PSA), i.e. an adhesive that forms a bond by contacting an adhesive film with a substrate, i.e. a filled flexible package, and applying pressure. The pressure sensitive adhesive does not cure to form a solid material, but remains tacky. Thus, they remain tacky at all times.
Pressure sensitive adhesives are typically formulated from elastomers (e.g., natural rubber, vinyl ethers, acrylics, butyl rubber, styrene block copolymers, silicones, nitriles or chemically modified versions thereof), optionally including tackifiers (e.g., terpenes, aromatic resins, hydrogenated hydrocarbon resins, or terpene-phenolic resins).
In a preferred embodiment, the adhesive is a removable or fugitive adhesive, i.e., a pressure sensitive adhesive that forms a temporary bond that can be removed after a relatively long period of time without leaving a residue on the adherend.
A pressure sensitive adhesive is applied to at least a portion of the inner bottom or inner vertical wall.
In a preferred embodiment, it is applied to at least a portion of the inner bottom. In this embodiment, it may be additionally applied to at least a portion of the inner vertical wall, if so desired.
The adhesives are applied in liquid form, for example as a solution in an organic solvent, as an aqueous dispersion or as a hot melt. The liquefied adhesive may be sprayed, rolled, spun, painted, or applied with a glue gun.
In a preferred embodiment, the one-component adhesive is a hot melt PSA. Hot melt PSAs are typically based on styrenic block copolymers or (chemically modified) ethylene copolymers or homopolymers, optionally formulated with oils, plasticizers and tackifiers. Even more preferably, the one-component adhesives are removable Hot Melt Pressure Sensitive Adhesives (HMPSA) because these adhesives can be easily peeled off without leaving residues.
The adhesive may also be in the form of a double-sided tape, although this is less preferred as it may be difficult to remove without leaving a layer of adhesive on the rigid package after use.
The one-component adhesive is preferably applied to the inside bottom or vertical wall after the rigid package is assembled or opened. The adhesive may be applied in various patterns, preferably such that a large contact area is obtained.
In a preferred embodiment, the flexible and rigid packages can be separated after use by applying only a small tearing force, so that they can be handled separately. This can be accomplished by applying the adhesive in a spiral or swirl pattern. If the rigid package is not chemically contaminated, it can be reused, recycled or disposed of as (paper or plastic) waste. Flexible packaging may be considered chemical waste and may require different disposal.
Two-component adhesive
The adhesive layer present on the inner bottom or vertical wall of the rigid package may constitute the first component of the two-component adhesive. The component may be applied after assembly or opening of the rigid package, but may also be applied during manufacture of the rigid package or on an unfolded box.
An advantage of this embodiment is that the first component only adheres to the second component and not to other substrates, so that the case containing the first component layer can be easily folded, unfolded and stacked without sticking together.
The first component may be spray coated, printed, roll coated, dip coated, spin coated, painted or applied using a glue gun.
The first component is preferably applied to at least a portion of the inside bottom of the rigid package.
The second component of the adhesive is applied on the outside, preferably the outside bottom, of the flexible package. It can be applied by spraying, printing, roll coating, dip coating, spin coating, lacquer coating or with a glue gun.
The second component adheres only to the first component and not to other flexible packaging so that the flexible packaging can be easily stacked without sticking together.
Placing the filled flexible package on the first component layer in the rigid package will combine the two components, thereby adhering the package.
The two-component adhesive is preferably a pressure sensitive adhesive, more preferably a removable pressure sensitive adhesive.
The two components should be applied to the flexible and rigid packaging in a manner that ensures a sufficiently large contact area between the two components after insertion into the flexible packaging.
In a preferred embodiment, the flexible package and the rigid package can be easily disassembled after use so that they can be handled separately. If the rigid package is not chemically contaminated, it can be reused, recycled or disposed of as (paper or plastic) waste; flexible packaging may be considered chemical waste and may require different ways of disposal.
Hook and loop belt
In another embodiment, the adhesive layer forms part of one or more hook and loop (e.g., Velcro) strips that adhere to the bottom or vertical walls of the rigid package; opposite portions of the strip are adhered to the outside of the flexible package. Preferably, one portion of the hook and loop strip is adhered to the inside bottom of the rigid package and the opposite portion is adhered to the outside bottom of the flexible package.
The tape may be applied via an adhesive layer on the back of the hook and loop tape.
Placing the filled flexible package in a rigid package will combine the two parts, thereby adhering the package.
However, a disadvantage of this embodiment is that a portion of the strap may remain attached to the rigid package, thereby reducing or complicating recycling possibilities.
The two parts of the hook and loop tape should be applied to the flexible and rigid package in a manner that ensures a sufficiently large contact area between the two parts after insertion into the flexible package.
Particulate material
The particulate material preferably has the form of a powder, granules, (micro) pearls, beads, flakes or crystals, and may have any suitable shape. The particulate material is preferably free flowing, which means that it does not stick together to form agglomerates.
Paste
The paste according to the invention consists of a suspension of the particulate material in a fluid which acts as a matrix for the particulate material. The paste behaves as a solid until stress is applied, at which time it flows like a fluid. The paste exhibited this behavior at room temperature.
Gel
According to the present invention, a gel represents a viscoelastic fluid that does not behave like an ideal liquid. The gel exhibited this behavior at room temperature.
Examples of compounds requiring labeling of GHS and/or CLP are solid initiators and initiator formulations.
Other examples are materials added to the polymer as antistatic agents, anti-slip agents, anti-fogging agents or anti-blocking agents. These materials are usually based on glycerides, ethoxylated amines, fatty amines or fatty amides, often dispersed in a polymer matrix.
Other examples are carbon black, flame retardants, fatty alcohol esters and polymeric esters of long chain alcohols.
Examples of initiators are organic peroxides, azides and C-C-initiators. The initiator formulation includes an initiator formulated on a solid inorganic carrier and an initiator masterbatch dispersed in a polymer matrix.
Specific examples of solid initiators are dicumyl peroxide, di (t-butylperoxyisopropyl) benzene, dicetyl peroxydicarbonate, dimyristyl peroxydicarbonate, dilauroyl peroxide, di (4-t-butylcyclohexyl) peroxydicarbonate, didecanoyl peroxide, dibenzoyl peroxide, 2 ' -azobis (isobutyronitrile), 2 ' -azobis (2-methylbutyronitrile), 1 ' -azobis (hexahydrobenzonitrile) and 2, 3-dimethyl-2, 3-diphenylbutane.
Examples of solid initiator formulations are formulations comprising (i) a solid or liquid organic peroxide, azide or C-initiator and (ii) a solid phlegmatizer.
Examples of suitable phlegmatisers are solid inorganic carriers (e.g. calcium carbonate, silica, clay), polymeric (e.g. polypropylene) matrices and solid organic phlegmatisers (e.g. dicyclohexyl phthalate or glyceryl tribenzoate).
Examples of organic peroxides which can be formulated with solid phlegmatisers are dibenzoyl peroxide, bis (4-methylbenzoyl) peroxide, 2, 5-dimethyl-2, 5-di (tert-butylperoxy) -3-hexyne, 2, 5-dimethyl-2, 5-di (tert-butyl) hexane, tert-butylcumyl peroxide, di (tert-butylperoxyisopropyl) benzene, dicumyl peroxide, butyl 4, 4-di (t-butylperoxy) valerate, 1-di (t-butylperoxy-3, 3, 5-trimethylcyclohexane, t-butyl peroxybenzoate, di (4-t-butylcyclohexyl) peroxydicarbonate, and 3,6, 9-triethyl-3, 6, 9-trimethyl-1, 4, 7-triperoxonane (triperoxanone).
Method
The flexible package is filled with a particulate material, paste or gel and the filled flexible package is then contacted with an adhesive layer present on the inside of the rigid package, contacting the outside of the filled flexible package with the adhesive layer, optionally containing a second component of the two-component adhesive or an opposite part of the hook and loop tape, thereby adhering the flexible package to the rigid package.
In a preferred embodiment, the adhesive layer is present on the inside bottom of the rigid package, contacting the bottom of the filled flexible package with the adhesive layer, optionally comprising the second component of the two-component adhesive or the opposite part of the hook and loop tape, thereby adhering the bottom of the flexible package to the bottom of the rigid package.
The flexible package may be outside the rigid package, or may be (partially) inside the rigid package when filled. If the filling is performed (partly) inside the rigid package, the weight increase caused by the filling will generate the pressure needed to adhere the flexible package to the rigid package. However, it should be ensured that the flexible package and the rigid package do not stick before filling.
After filling, the flexible package is closed, for example sealed or closed with a closure strip.
The rigid package containing the closed flexible package is closed, for example by folding a cover or placing a cover.
The outer wall of the rigid package may be marked with the required information regarding chemical composition and safety. The marking may be applied before, during or after the method of the invention.
The following are part of the present invention:
item:
1. a method for packaging particulate material, the method comprising the steps of:
-providing a rigid package having a bottom, a top and vertical walls, said rigid package being open at the top and comprising an adhesive layer on at least a part of the inner bottom or inner vertical wall,
-filling the flexible packaging with a particulate material,
-bringing the filled flexible package into contact with an adhesive layer, thereby adhering the flexible package to the rigid package,
-closing the rigid package.
2. The method of item 1, wherein the adhesive layer is on at least a portion of the inside bottom of the rigid package.
3. The method of item 1 or item 2, wherein the adhesion layer is a one-component adhesive.
4. The method of item 2, wherein the adhesive layer comprises a first component of a two-component adhesive; the second component of the adhesive is present on the outside bottom of the bag.
5. The method of item 2, wherein the adhesive layer forms part of at least one hook and loop strip adhered to the inside bottom of a cartridge or drum; the opposing portion of the at least one strip is adhered to the outside bottom of the bag.
6. The method according to any of the preceding claims, wherein the rigid package is a box or drum, preferably made of cardboard or fiberboard.
7. The method according to any one of the preceding claims, wherein the flexible packaging is a bag, preferably made of plastic.
8. The method according to any one of the preceding claims, wherein the particulate material is a compound requiring GHS and/or CLP labelling.
9. The method of claim 8, wherein the compound is an organic peroxide or an organic peroxide formulation.
10. The method of any one of the preceding claims, wherein the adhesive is a Pressure Sensitive Adhesive (PSA).
11. The method of item 10, wherein the adhesive is a Hot Melt Pressure Sensitive Adhesive (HMPSA).
Claims (10)
1. A method for packaging particulate material, paste or gel, the method comprising the steps of:
-providing a rigid package having a bottom, a top and vertical walls, said rigid package being open at the top and comprising an adhesive layer on at least a part of the inner bottom or inner vertical wall,
-filling the flexible packaging with a particulate material, paste or gel,
-bringing the filled flexible package into contact with an adhesive layer, thereby adhering the flexible package to the rigid package,
-closing the rigid package by means of a closure,
characterized in that the particulate material, paste or gel is a compound requiring GHS and/or CLP labelling.
2. The method of claim 1, wherein the adhesive layer is on at least a portion of the inside bottom of the rigid package.
3. The method of claim 1 or 2, wherein the adhesion layer is a one-component adhesive.
4. The method of claim 2, wherein the adhesive layer comprises a first component of a two-component adhesive; the second component of the adhesive is present on the outside bottom of the bag.
5. The method of claim 2, wherein the adhesive layer forms part of at least one hook and loop strip adhered to the inside bottom of a cartridge or drum; the opposing portion of the at least one strip is adhered to the outside bottom of the bag.
6. The method according to any of the preceding claims, wherein the rigid package is a box or drum, preferably made of cardboard or fiberboard.
7. The method according to any of the preceding claims, wherein the flexible packaging is a bag, preferably made of plastic.
8. The method of claim 1, wherein the compound is an organic peroxide or an organic peroxide formulation.
9. The method of any preceding claim, wherein the adhesive is a Pressure Sensitive Adhesive (PSA).
10. The method of claim 9, wherein the adhesive is a Hot Melt Pressure Sensitive Adhesive (HMPSA).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP21016962 | 2018-12-11 | ||
| EP182116962 | 2018-12-11 | ||
| PCT/EP2019/084761 WO2020120634A1 (en) | 2018-12-11 | 2019-12-11 | Method for packaging particulate material, paste or gel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113195364A true CN113195364A (en) | 2021-07-30 |
| CN113195364B CN113195364B (en) | 2023-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980081844.4A Active CN113195364B (en) | 2018-12-11 | 2019-12-11 | Method for packaging particulate material, paste or gel |
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| Country | Link |
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| CN (1) | CN113195364B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145055A (en) * | 1994-11-16 | 1997-03-12 | 列金德有限公司 | Fluid containers and methods of manufacture thereof |
| EP1010640A2 (en) * | 1998-11-22 | 2000-06-21 | Eastman Kodak Company | Bag-in-box container |
| WO2001079072A1 (en) * | 2000-04-13 | 2001-10-25 | Dr Pepper/Seven Up, Inc. | Bag-in-box container for liquids |
| DE102006058372A1 (en) * | 2006-12-08 | 2008-06-12 | Drw Ag | Bundle for holding paints or dyes comprises a bag connected in its lower region to a lower region of a container |
| WO2017135927A1 (en) * | 2016-02-02 | 2017-08-10 | Bemis Company, Inc. | Bag-in-box package with collapsed head-space |
-
2019
- 2019-12-11 CN CN201980081844.4A patent/CN113195364B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145055A (en) * | 1994-11-16 | 1997-03-12 | 列金德有限公司 | Fluid containers and methods of manufacture thereof |
| EP1010640A2 (en) * | 1998-11-22 | 2000-06-21 | Eastman Kodak Company | Bag-in-box container |
| WO2001079072A1 (en) * | 2000-04-13 | 2001-10-25 | Dr Pepper/Seven Up, Inc. | Bag-in-box container for liquids |
| DE102006058372A1 (en) * | 2006-12-08 | 2008-06-12 | Drw Ag | Bundle for holding paints or dyes comprises a bag connected in its lower region to a lower region of a container |
| WO2017135927A1 (en) * | 2016-02-02 | 2017-08-10 | Bemis Company, Inc. | Bag-in-box package with collapsed head-space |
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| Publication number | Publication date |
|---|---|
| CN113195364B (en) | 2023-09-22 |
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