EP2616583B1

EP2616583B1 - Applications of indicia designed with flocks to garments

Info

Publication number: EP2616583B1
Application number: EP11776867.1A
Authority: EP
Inventors: Celine Cremin
Original assignee: ITW Ireland ULC
Current assignee: ITW Ireland ULC
Priority date: 2010-09-15
Filing date: 2011-09-14
Publication date: 2016-12-28
Anticipated expiration: 2031-09-14
Also published as: WO2012035505A3; EP2616583A2; WO2012035505A2; US20130160193A1; BR212013005576U2; CN103119216B; BR112013005576B1; CN103119216A

Description

The invention relates to application of designs to garments and other fabrics.
Conventional appliques or transfers comprise man-made fibres that do not decompose and therefore are not susceptible to recycling.
The invention is directed towards achieving more environmentally-friendly fabrics.
GB2245220 , GB1597907 , US2008/302772 and US 4 396 662 disclose multilayer flock appliques comprising a substrate, a flock, an ink in the flock and an adhesive for adhering the applique to a fabric.

Summary of the Invention

According to the invention, there is provided an applique comprising:

a substrate or carrier,
flock derived from recycled material,
ink in the flock, and
an adhesive for adhering the applique to a fabric;
wherein the flock comprises fibres of random length.

In a further embodiment, fibres are arranged in predefined areas extending uniformly across the carrier or substrate.
In one embodiment, the fibres are in groups comprising of a random number of fibres which have been flocked in a primarily uniform vertical orientation using an electrostatic flocking machine.
In another embodiment, the flock is printed with ink according to a design.
In a further embodiment, the applique comprises at least two adhesive layers.
In one embodiment, the recycled flock applique is inserted into a flock print, to create a combination of surface textures.
In another embodiment, the recycled flock applique is inserted into a recycled flock print, to create a combination of surface textures.
In a further embodiment, the applique comprises flock fibres of a plurality of colours and/or various recycled flock materials.
In one embodiment, the applique further comprises a recycled flock applique insert.
In another embodiment, the flock is over a textile substrate whereby textile creates structure for the print.
In a further embodiment, the flock is over sublimated textile.
In one embodiment, the flock is over a foil, metal or foil film.
In another embodiment, the foil comprises a holographic pattern.
In a further embodiment, the flock is over a migration-resistant barrier or migration-resistant barrier composite.
In another aspect, there is provided a method of manufacturing an applique as described above, comprising the steps of depositing the flock onto a carrier or substrate and applying an ink to the flock.
In one embodiment, the carrier or substrate is a disposable carrier.
In another embodiment, the flock is deposited onto a release adhesive.
In a further embodiment the method comprises forming a printed single colour or multicoloured recycled flocked surface using recycled flock fibres.
In one embodiment, the flock is applied by electrostatic flocking machine and flock fibres are flocked onto the release adhesive which is still wet.
In another embodiment, the fibres are in groups comprising of a random number of fibres which have been flocked in a primarily uniform vertical orientation using an electrostatic flocking machine, vertical flock orientation typically ranging from 60° to 120°.
In a further embodiment, the method comprises the step of drying in an oven and removing any surplus and loose excess flock.

Detailed Description of the Invention

The invention will be more clearly understood from the following description of some embodiments thereof, given by way of example only with reference to the accompanying drawings in which:-

Figs. 1(a) to (e) are a series of cross-sectional diagrams showing stages of manufacturing of an applique of the invention, in which Fig. 1(a) shows a release adhesive on a disposable carrier, Fig. 1(b) shows application of recycled flock, Fig. 1(c) shows application of ink into the flock fibres, and Fig. 1(d) shows the stage after adhesive has been bonded to the flock fibres to complete the applique; and Fig 1.(e) is a view after heat application bonding to fabric;
Fig. 2 is a view after removal of the disposable carrier;
Figs. 3 to 10 are diagrammatic cross-sectional views showing appliques of various embodiments, in which:
- Fig. 3 shows use of an eco flock encapsulated by a flock print,
- Fig. 4 shows an eco flock encapsulated by a recycled flock transfer,
- Figs. 5(a), (b), and (c) show stages of manufacture of an applique with a mixed fibre eco flock transfer,
- Fig. 6 shows flocking directly onto an adhesive layer,
- Fig. 7 shows flocking directly onto a satin or textile material,
- Fig. 8 shows flocking directly onto a sublimated satin textile mat,
- Fig. 9 shows flocking directly onto a metal foil or holographic foil film, and
- Fig. 10 shows flocking directly onto a migration resistant barrier.

Description of the Embodiments

A recycled flock applique is created using recycled textiles, inks and adhesive systems. The applique is "eco friendly" due to the recycled flock fibre surface and with water-based adhesive binder. Therefore, fewer raw materials are used in the manufacture of the applique.
The substrate or carrier may be in any suitable flat sheet format, including a backing film or parchment. A recycled flock transfer includes a release flock adhesive which holds one end of the flock fibres which have been colour printed, while a permanent flocking adhesive binds the fibres together at the other end of the fibre filaments.
A method of manufacturing a recycled flock applique includes the steps of:

(i) providing a substrate or carrier comprising of recycled flock fibres and a flock adhesive,
(ii) providing a substrate or carrier comprising of skeleton flock fibres and a flock adhesive,
(ii) providing a coloured image in the design, and
(iii) providing a permanent adhesive layer to bind recycled flock fibres.

Figs. 1 to 10 show various manufacturing methods and constituents of appliques of the invention, indicated in the legends to the right side of the diagrams.
Fig. 1(a) shows a disposable carrier 5 and a release adhesive 4 printed onto the carrier 5. The carrier 5 is of polyester, which also may be recycled.
Fig. 1(b) shows recycled flock 2 deposited into the flock release adhesive 4. This is performed electrostatically, to achieve a high flock density. The recycled flock fibres have a sufficient electrical conductivity to respond to the electrostatic flocking process. Good flocking can only be achieved with correct humidity and temperature conditions, which are preferably 21°C and 65% relative humidity. The flock is applied into the wet adhesive using an electrostatic flocking machine. The flocking procedure is carried out with an electrostatic flocking machine, which charges the flock fibres with a voltage of 40 to 100 kV, enabling the fibres to be shot from the equipment to any grounded surface. This process is enabled using open screens to adhere onto the release adhesive. The flock fibres jump along the electrostatic field lines from the flocking chamber to any earthed surface. To ensure an evenly flocked surface this requires that the flocking chamber is moved over the surface of the substrate with always the same speed and distance for each flock chamber.
The period of time during which the flocking has to be completed is called the "open time" of the release adhesive. The flock is dried in an oven or on a conveyor oven and any surplus flock (excess flock) is cleaned from the flock surface.
The recycled textile materials are ground and sieved to textile length, typically 0.1mm to 1.2mm. These fibres, unlike conventional fibres, can be of random shape. The non-recycled material content averages 10% - 75 % of the weight of the transfer.
The flock skeleton framework helps to provides vertical structure. It is compromised of recycled flock fibres and/or non-recycled flock fibres, typically known in the industry as double indexing.
Fig. 1(c) shows how the applique is coloured using ink deposits 1 on recycled flock fibres. Colours can be applied to the design using silk screen printing ink application methods with a water base and/or digitally printing designs and/or sublimating digital images onto the recycled flock material. If a multi-colour design is printed, graphic items are allowed to dry between colours (using a batch oven or a conveyor oven), to allow water and/or solvent to evaporate from the ink. The graphic is then printed with a different colour. This process is repeated until all colours in the graphics have been printed. Water based ink and/or eco friendly inks such as soya-based inks can be used.
Where digital printing is used for ink application, the flock is printed using digital print technology according to the design requirements. Graphic items are allowed to dry after printing, either by air drying at room temperature or at elevated temperature in a conventional batch oven or a conveyor oven. Water-based digital inks and/or eco friendly digital inks can be used in this process
Where sublimation printing is employed for ink application the flock is sublimated using sublimation print technology according to the design requirements. Graphic items are allowed to cool after sublimating, before sublimation transfer paper is removed.
Fig. 1(d) shows an adhesive layer 3 is screen-printed onto the flock 2. A two-component flocking adhesive system is used during adhesive printing. This flocking adhesive may contain fillers. Fillers used in the adhesive printing preferably come from recycled materials. The period of time during which a two-component mixture of adhesive and catalyst has to be used up, is called "pot life". A flocking adhesive is printed on top of the coloured graphics according to a design, using silk screen printing techniques. In order to achieve a sturdy and abrasion-resistant recycled flock product, it is necessary to ensure that tips of the flock fibres and part of the flock fibre strand length is immersed in flock adhesive, during the printing process. This means that the thickness of the dried adhesive has to be typically a fifth of the flock length.
The adhesive is dried in an oven or on a conveyor oven; this step allows water and/or solvent to evaporate from the flocking adhesive. After drying has been completed the adhesive system can by cross-linked in an oven or a conveyor oven.
A starch-based adhesive may be employed, so that it may be recycled.
The adhesive layer 3 (and also the adhesive layers 21, 24, 31, and 40 of other embodiments) may be a permanent adhesive. It comprises of a thermoplast adhesive combined with a thermoset adhesive. The ratio of thermoplastic adhesive to thermoset adhesive is in the range of 0:100 to 100:0, preferably 0.1: 99.1 to 99.9:0.1, and most preferably 0.25:99.75 to 99.75:0.25
Alternatively, it comprises of a thermoset adhesive coupled with thermoplastic powder. The powder can be made from an aromatic or aliphatic thermoplastic. The thermoset adhesive can include one or more (but not limited to) acrylic, polyamide; epoxy, polyester; polyolefin; polyurethane; and silicone and combinations thereof.
To apply a design to a textile, the applique of this or the other embodiments is placed on the textile (Fig. 1(e)) heat is applied, and the disposable carrier (5, in this embodiment) is removed (Fig. 2), leaving the adhesive layer 3 in contact with the textile. Heat and pressure are applied so that the hot-melt adhesive layer 3 softens onto the fabric (F) to adhere the applique in place, once above the film's initial glue line temperature. Alternatively, applications can be carried out using high frequency welding or ultrasonic bonding.
The applique is applied by pressing under heat, in this example 160°C and 2 Bar for 20 seconds, allowed to cool, and the disposable carrier is peeled from the applique.
In various embodiments a heat transfer or applique may incorporate customised ink layers to create a textured motif. The invention uses waste fibres from textile waste streams to create a recycled "environmentally responsible flock" heat transfer or applique.
Recycled flock can be manufactured from recycled textiles (for example cotton, polyester, polypropylene, biological, composite, mineral or viscose rayon) and/or post industrial plastics converted into textiles and/or natural plant materials converted into textiles and/or renewable textile materials and/or a combination of any of the above which has been converted into textiles which in turn have been converted into flock.
The raw materials can be used as a single source fibre or in hybrid format. Single or multicolour images can be digitally printed and screen printed onto the surface of the design which may use a range of environmentally-friendly ink systems.
The design can be further enhanced by using a variety of artwork effects and techniques. Examples include embossing, encapsulating, and engraving. The product can also incorporate waste material from a number of in-house manufacturing streams. For example, a milled waste heat transfer may be recycled by incorporation into the adhesive layer. The heat transfer can be designed to incorporate a biodegradable carrier. A single or multicolour design insert may be added to the heat transfer. The design insert may be made from a range of conventional, alternative or convertible fabrics including organic textiles, Fig. 5(c).
An applique of Fig. 3 comprises a disposable carrier 25, and has a similar arrangement to Figs. 1 and 2 except that there is a recycled flock insert bonded to the flock applique. The recycled flock applique provides a background texture which can be applied in any graphic format. In this embodiment, the various layers are applied as follows:

A release adhesive 21 is printed onto the carrier 25 and flock 20 is deposited onto the release adhesive, and a permanent adhesive 21 is screen printed onto the back of the flock in areas where a graphic is required. A pre-manufactured recycled flock graphic (22, 23 & 24) such as shown in Fig. 7 is bonded onto the graphic through heat application, to create a multilayer graphic. An advantage of this system is that it is possible to create a multiple layer graphic.

An applique of Fig. 4 comprises a disposable carrier 35 and has a similar arrangement to Fig. 1(d) except that there is a recycled flock insert bonded to the recycled flock applique. The recycled flock applique provides a background texture which can be applied in any graphic format. In this embodiment, the layers are applied as follows:

A release adhesive is printed onto a carrier 35 and flock 30 is deposited onto the release adhesive, and a permanent adhesive 31 is screen printed onto the back of the flock in areas where a graphic is required. A pre-manufactured recycled flock graphic (22, 23 & 24) such as shown in Fig. 7 is bonded onto the graphic through heat application, to create a multilayer graphic.

An advantage of this system is that it is possible to create a multiple-layer recycled flock graphic.
An applique of Fig. 5(a).a comprises a disposable carrier 48 and has a similar arrangement to Fig. 1(d) except that multiple recycled flock fibres 41, 42 can be flocked during the flocking process. These flock fibres can be the same type of recycled flock but in different colours or flocks from different sources, for example. a recycled cotton flock, recycled viscose rayon flock, a recycled polyester flock, all flocked from different flocking chambers or stations. An adhesive layer is printed on top of all flock fibres to bond these together. An advantage of this configuration is that infinite textile patterns can be created through the use of different colours / types of flock fibres in combination with printing graphics.
An applique of Fig. 5(b) comprises a disposable carrier 48 and has a similar arrangement to Fig. 4 except that the recycled flock fibres are made up of different flock colour flock fibres or different types of flock fibres 41, 42. A recycled flock insert is bonded to the recycled flock applique (45, 46, 47). The recycled flock applique provides a background texture which can be applied in any graphic format. In this embodiment, the various layers are applied as follows:

A release adhesive is printed onto a carrier 48 and flock 41, 42 is deposited onto the release adhesive, and a permanent adhesive 40 is screen printed onto the back of the flock in areas where a graphic is required. A pre-manufactured recycled flock graphic (22, 23 & 24) such as shown in Fig 7 is bonded onto the graphic through heat application, to create a multilayer graphic.

An advantage of this system is that it is possible to create a multiple layer recycled flock graphic.
An applique of Fig. 5(c) comprises a disposable carrier 48. It has a similar arrangement to that of Fig. 4 except that the recycled flock fibres are made up of different colour flock fibres or different types of flock fibres 41, 42. There a recycled fabric composite 49 insert bonded to the recycled flock applique. The recycled fabric composite provides a background texture and/o colour which can be applied in any graphic format. In this embodiment, the various layers are applied as follows:

A release adhesive is printed onto a carrier 48 and flock 41, 42 is deposited onto the release adhesive, and a permanent adhesive 40 is screen-printed onto back of the flock in areas where graphic is required. A pre-manufactured recycled fabric composite 49 is bonded onto the graphic through heat application, to create a multilayer recycled applique.

An advantage of this system is that it is possible to create a multiple layer recycled flock graphic incorporating recycled fabric.
Referring to Fig. 6 a hotmelt film 52 is applied to a disposable carrier 53. Recyclable adhesive 51 is applied to the hotmelt, and this is flocked with flock 50.
The hotmelt adhesive layer (51, 61, 71, 81, 91) comprises of a thermoplastic film made from an aromatic or aliphatic thermoplastic. The hotmelt film can include one or more (but not limited to) polyamide; polyester; polyolefin; polyurethane; polyurethane urea and polyurethane ester. For example, the hot-melt film can be 76 micron Bemis Polyester Hotmelt Film 5250.
To apply a design to a textile, the applique (59, 69, 79, 89, 99) is simply placed on the textile after removing the disposable carrier (53, 64, 74, 84, 94) with the hotmelt film adhesive layer in contact with the textile. Heat and pressure are applied so the hot-melt softens onto the fabric (F) to adhere the applique in place, once above the film's initial glue line temperature. Alternatively, applications can be carried out using the high frequency welding method or ultra sonic bonding method.
Referring to Fig. 7, there is a similar arrangement except that there is textile (or alternatively another textile) on the hotmelt film. The satin provides a background so that the recycled flock can be applied in any desired pattern. A hotmelt film 63 is applied to a textile 62 (through a heat application process), adhesive 61 is applied to the textile prior to flocking and while adhesive is wet flock 60 is deposited into the wet adhesive.
An arrangement is shown in Fig. 8 in which there is no disposable carrier, and sublimated textile acts as a substrate. The textile is sublimated with a colour and/or pattern, a hotmelt film 73 is applied to a textile 72 (through a heat application process), adhesive 71 is applied to the textile prior to flocking and while the adhesive is wet flock 70 is deposited into the wet adhesive.
An arrangement is shown in Fig. 9 in which a foil, metal or holographic film acts as a substrate. A hotmelt film 83 is applied to a foil (through a heat application process), metal or holographic foil/film 82, adhesive 81 is applied to the foil prior to flocking and while the adhesive is wet flock 80 is deposited into the wet adhesive.
In an arrangement shown in Fig. 10 foil, a migration resistant barrier or composite barrier acts as a substrate. A hotmelt film 93 is applied to a barrier (through a heat application process) 92, adhesive 91 is applied to the barrier prior to flocking and while adhesive is wet flock 90 is deposited into the wet adhesive.
Advantages of this arrangement are that this creates a fully dye migration resistant applique for use of fabrics which have dye migration issues, thereby preventing the applique from becoming coloured by the fabric dye over time.
It will be appreciated from the embodiments above that the flock can be applied in a variety of positions in the layers to achieve the desired effects. For example recycled fibres may be flocked in-house onto a disposable carrier to produce a heat transfer in a number of steps. The steps include coating a disposable carrier film with release adhesive followed by flocking with recycled fibres. The pre-flocked sheets are then screen printed using environmentally friendly "eco" inks. An adhesive layer/hotmelt powder layer is screen printed to complete the applique. The resulting transfer is then applied to the garment using heat and pressure.
Alternatively, the steps include coating disposable carrier film with release adhesive followed by flocking with recycled fibres. The pre-flocked sheets are then sublimated with inks. An adhesive layer/hotmelt powder layer is screen printed to complete invention. The resulting transfer is then applied to the garment using heat and pressure.
In another alternative recycled flock fibres are flocked in-house onto a substrate which includes a hotmelt film. There is application of an adhesive on the substrate followed by flocking with recycled fibres. The pre-flocked sheets are then screen printed using inks to complete the process. The resulting design can then be either laser or die cut and applied to the garment using heat and pressure. The benefit of an applique is that no additional disposable carrier is necessary, which adds to the environmental benefits of this product.
The invention is not limited to the embodiments described but may be varied in construction and detail.

Claims

An applique comprising:
a substrate or carrier,

flock derived from recycled material,

ink in the flock, and

an adhesive for adhering the applique to a fabric;

wherein the flock comprises fibres of random length.
An applique as claimed in claim 1, wherein the flock fibre length is in the range of 0.1 mm to 1.2 mm.
An applique as claimed in claims 1 or 2, wherein fibres are arranged in predefined areas extending uniformly across the carrier or substrate.
An applique as claimed in any preceding claim, wherein the fibres are in groups comprisinga random number of fibres which have been flocked using an electrostatic flocking machine with flock orientation ranging from 60° and 120° with respect to the substrate.
An applique as claimed in any preceding claim, wherein the flock is printed with ink according to a design.
An applique as claimed in any preceding claim, wherein the applique comprises at least two adhesive layers.
An applique comprising the applique as claimed in any preceding claim inserted into a flock print, to create a combination of surface textures.
An applique comprising the applique as claimed in any preceding claim inserted into a recycled flock print, to create a combination of surface textures.
An applique as claimed in any preceding claim, comprising flock fibres of a plurality of colours and/or various recycled flock materials.
An applique as claimed in any preceding claim, further comprising a recycled flock applique insert.
An applique as claimed in any preceding claim, wherein the flock is over a textile substrate whereby textile creates structure for the print.
An applique as claimed in any of claims 1 to 10, wherein the flock is over sublimated textile.
An applique as claimed in any of claims 1 to 10, wherein the flock is over a foil, metal or foil film.
An applique as claimed in claims 13, wherein the foil comprises a holographic pattern.
An applique as claimed in any preceding claim, wherein the flock is over a migration-resistant barrier or migration-resistant barrier composite.