WO2023163990A1 - Enveloppes matelassées à base de fibres - Google Patents

Enveloppes matelassées à base de fibres Download PDF

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Publication number
WO2023163990A1
WO2023163990A1 PCT/US2023/013616 US2023013616W WO2023163990A1 WO 2023163990 A1 WO2023163990 A1 WO 2023163990A1 US 2023013616 W US2023013616 W US 2023013616W WO 2023163990 A1 WO2023163990 A1 WO 2023163990A1
Authority
WO
WIPO (PCT)
Prior art keywords
envelope
outer layer
fiber
layer
inner layer
Prior art date
Application number
PCT/US2023/013616
Other languages
English (en)
Inventor
Parimal Vadhar
Matthew James ODER
Anant PARTE
Bradley DALEY
Manali BANERJEE
Original Assignee
Sealed Air Corporation (Us)
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 Sealed Air Corporation (Us) filed Critical Sealed Air Corporation (Us)
Publication of WO2023163990A1 publication Critical patent/WO2023163990A1/fr

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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/03—Wrappers or envelopes with shock-absorbing properties, e.g. bubble films
    • 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
    • B65D27/00—Envelopes or like essentially-rectangular containers for postal or other purposes having no structural provision for thickness of contents
    • B65D27/12—Closures
    • B65D27/14—Closures using adhesive applied to integral parts, e.g. flaps
    • B65D27/16—Closures using adhesive applied to integral parts, e.g. flaps using pressure-sensitive adhesive
    • 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
    • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38—Packaging materials of special type or form
    • B65D2565/381—Details of packaging materials of special type or form
    • B65D2565/382—Details of packaging materials of special type or form made of special paper
    • B65D2565/383—Details of packaging materials of special type or form made of special paper made of recycled paper

Definitions

  • the present disclosure is in the technical field of cushioned envelopes. More particularly, the present disclosure is directed to fiber-based cushioned envelopes that are easily recyclable and/or repulpable.
  • One type of a commercial mailer is an envelope with a front and rear wall, sealed at its two lateral and bottom edges, with a flap integrally formed from and extending from the rear wall.
  • the flap extends beyond the upper end of the front wall when the envelope is open.
  • the flap includes on one side a pressure sensitive adhesive that is covered by a release tape. After the envelope is filled with an article to be mailed, the release tape is removed from the flap, and the flap is folded over and adhered to the exterior surface of the front wall, thus sealing the envelope.
  • the walls of this type of commercial envelope comprise a multilayer outer ply, and an air cellular material forming an inner ply.
  • the air cellular material is typically a material such as BUBBLE WRAPTM air cellular material sold by Sealed Air Corporation.
  • all-plastic mailers became more popular. These all plastic mailers typically have an outer ply that comprises an outer layer of a high density polyethylene (HDPE), and an inner layer comprising a low density polyethylene (LDPE). The outer layer thus forms the outermost layer of the envelope. The inner layer is in adhering contact with the air cellular material of the inner ply.
  • HDPE high density polyethylene
  • LDPE low density polyethylene
  • the inner layer is in adhering contact with the air cellular material of the inner ply.
  • all-plastic mailers nevertheless have some disadvantages. In particular, all-plastic are typically very difficult for consumers to recycle.
  • All-plastic mailers typically include types of films that are not accepted in the most convenient recycling locations.
  • all-plastic mailers are not accepted in most curbside recycling bins. It may be possible for consumers find drop-off recycling locations that will accept all-plastic mailers. However, it is typically inconvenient for consumers to take used all-plastic mailers to such drop-off recycling locations and many all-plastic mailers end up being thrown away and ending up in landfill or other solid waste disposal facilities. It would be advantageous for mailers to be formed from materials that allows the mailers to be conveniently recycled by consumers, such as in their curbside recycling bins.
  • an envelope comprising an outer layer and an inner layer.
  • the outer layer is a first fiber-based material in a substantially flat form.
  • the inner layer is coupled to the outer layer and the inner layer is a second fiber-based material in a substantially three-dimensional form.
  • the outer layer and the inner layer are arranged to form an interior of the envelope and a mouth through which an object can be inserted into the interior of the envelope.
  • the envelope includes at least one seam forming a side or a bottom of the envelope.
  • the at least one seam includes two plies of the outer layer and two plies of the inner layer sandwiched between the two plies of the outer layer.
  • each of the plies of the outer layer is adhered to one of the plies of the inner layer and the two plies of the inner layer are adhered to each other.
  • a percentage of non-fiber-based material in the envelope is less than or equal to about 10%.
  • the at least one seam of the first embodiment comprises a first lateral seam and a second lateral seam.
  • the outer and inner layers of the second embodiment are folded to such that the fold extends transversely between the first and second lateral seams to form a bottom of the envelope.
  • the outer and inner layers of any of the second and third embodiments are not adhered to each other between the first and second lateral seams.
  • the first and second fiber-based materials of any of the preceding embodiments are paper.
  • the paper of the first fiber-based material in the outer layer has a weight that is less than a weight of the paper of the second fiber-based material in the inner layer.
  • the weight of the paper of the first fiber-based material in the outer layer of the fifth embodiment is less than or equal to 45 pounds per ream, and the paper of the second fiber-based material in the inner layer is greater than or equal to 50 pounds per ream.
  • the first fiber-based material of the outer layer of any of the preceding embodiments is formed from post-consumer materials.
  • the two plies of the inner layer are adhered to each other using a hot melt adhesive.
  • the hot melt adhesive of the eighth embodiment is applied to the inner and outer layers such that the hot melt adhesive has a thickness of at least 1 mil.
  • the hot melt adhesive of any of the eighth or ninth embodiments is applied to the inner and outer layers in random or pseudo-random patterns.
  • the first fiber-based material of the outer layer of any of the preceding embodiments has polymer-based coating thereon.
  • the second fiber-based material of the inner layer of any of the preceding embodiments is cold-formed into the three-dimensional form.
  • the three-dimensional form of the second fiber-based material of the inner layer of any of the preceding embodiments includes a pattern of alternating shapes that protrude from both sides of a plane of the second fiber-based material.
  • the alternating shapes that protrude from both sides of a plane of the second fiber-based material of the thirteenth embodiment are semispherical.
  • the envelope of any of the preceding embodiments further includes a closure flap configured to be selectively closed to cover the mouth.
  • closure flap of the fifteenth embodiment is integrally formed with the outer layer.
  • the closure flap of any of the fifteenth or sixteenth embodiments includes an adhesive layer and a release liner covering the adhesive layer.
  • FIG. 1 depicts a perspective view of a fiber-based envelope, which is in an open position and includes a closure flap, in accordance with the embodiments disclosed herein;
  • FIG. 2 depicts a front view of the envelope shown in Fig. 1 with the closure flap shown as pressed against the upper portion of the front wall of the envelope and the envelope in a closed position, in accordance with the embodiments disclosed herein;
  • FIG. 3 depicts a back view of the envelope shown in Fig. 1 with the closure flap shown as pressed against the upper portion of the front wall of the envelope and the envelope in a closed position, in accordance with the embodiments disclosed herein;
  • FIG. 4 depicts a front view of the envelope shown in Fig. 1 and before the envelope is in the closed position and with a release liner being removed from the closure flap, in accordance with the embodiments disclosed herein;
  • Fig. 5 depicts a perspective view of an envelope in an open position, where the envelope includes an alternative closure mechanism, in accordance with the embodiments disclosed herein;
  • Fig. 6 depicts a first instance of a method of forming the envelope shown in Fig. 1 where the outer layer is in a substantially flat form, in accordance with the embodiments disclosed herein;
  • Fig. 7 depicts a second instance of a method of forming the envelope shown in Fig. 1 where the web shows the inner layer adhered to the outer layer, in accordance with the embodiments disclosed herein;
  • Fig. 8 depicts a third instance of a method of forming the envelope shown in Fig. 1 where the web has adhesive layers applied to the inner layer, in accordance with the embodiments disclosed herein;
  • Fig. 9 depicts a fourth instance of a method of forming the envelope shown in Fig. 1 where the web has been folded to form the envelope and seams have been formed in the sides of the envelope, in accordance w ith the embodiments disclosed herein;
  • Fig. 10 depicts a partial cross-sectional view of the web after the inner layer has been adhered to the outer layer, in accordance with the embodiments disclosed herein;
  • FIG. 11 depicts a perspective view of the web after the inner layer has been adhered to the outer layer and before the web has been folded, in accordance with the embodiments disclosed herein;
  • Fig. 12 depicts an example of one of the adhesive layers on the inner layer, in accordance with the embodiments disclosed herein;
  • Fig. 13 depicts a cross-sectional view of the envelope showing how, using the method shown in Figs. 6-9, the seams of the envelope include two plies of the inner layer sandwiched between two plies of the outer layer, in accordance with the embodiments disclosed herein.
  • Fig. 1 depicts a perspective view of a fiber-based envelope 10, which is in an open position and includes a closure flap.
  • the envelope 10 includes a front wall 20, a rear wall 30 (better seen in Fig. 3), a bottom 40, a mouth 50, and a closure flap 60.
  • the envelope 10 can be constructed by making or providing at least two layers of fiber-based materials, including an outer layer 80 and an inner layer 90.
  • the outer and inner layers 80 and 90 can be coupled together to form the envelope 10.
  • the outer and inner layers 80 and 90 are made from fiber-based materials that are recyclable and/or repulpable materials, such as kraft paper or other kinds of paper.
  • the envelope 10 may be easily recycled (e.g., recycled in a curbside recycle bin).
  • one or both of the outer and inner layers 80 and 90 are formed from post-consumer fiber-based material and/or repulped fiber-based material.
  • the outer and inner layers 80 and 90 are coupled together by adhering the layers using a flexible hot melt adhesive such as an ethylene-vinyl-acetate-based (EVAbased) hot melt adhesive.
  • EVAbased ethylene-vinyl-acetate-based
  • the envelope 10 is formed from a single piece of the two-layer web.
  • the web has been folded so that the fold forms the bottom 40 of the envelope 10.
  • the fold also separates the front wall 20 and rear wall 30 of the envelope 10.
  • the front wall 20 and rear wall 30 are adhered together at a first lateral seam 70a and a second lateral seam 70b.
  • the first and second lateral seams 70a and 70b form the sides of the envelope 10.
  • the envelope 10 can be formed from two pieces of the two-layer web.
  • a bottom seam 70c can be formed in addition to the first and second lateral seams 70a and 70b and the bottom seam 70c forms the bottom 40 of the envelope 10.
  • the envelope 10 can be formed using any other method of envelope construction that are well known to those of skill in the art of envelope manufacture after a review of this specification.
  • the envelope 10 includes a mouth 50.
  • the mouth 50 extends between the first and second lateral seams 70a and 70b.
  • the mouth 50 provides access to the interior of the envelope.
  • a user can insert an object through the mouth 50 and into the interior of the envelope 10 in preparation for shipping the object in the envelope 10.
  • the envelope includes a closure flap 60.
  • the closure flap in the depicted embodiment is formed integrally with the rear wall 30 of the outer layer 80 as an extension of rear wall 30.
  • the closure flap 60 can be a discrete member that is separately made and then coupled (e.g., adhered) to the upper portion of rear wall 30. If the closure flap 60 is formed as an integral part of rear wall 30, then in the manufacturing process, the portion of the outer layer 80 forms the rear wall 30 is made longer than the portion of the outer layer 80 that forms the front wall 20.
  • the outer layer 80 is arranged such that a portion of the rear wall 30 extends beyond the longitudinal edge of the portion of the outer layer 80 that forms the front wall 20.
  • the formation and/or placement of closure flaps for envelopes in general is well known to those of skill in the art of envelope manufacture.
  • the closure flap 60 includes an adhesive layer 62, adhered directly or indirectly to the interior surface of the closure flap 60.
  • the adhesive layer 62 is on the interior surface of the extended portion of rear wall 30.
  • the envelope 10 may optionally include a release liner 64 (sometimes called a release tape or release foil) that covers the adhesive layer 62.
  • a release liner 64 sometimes called a release tape or release foil
  • closure flap 60 with the adhesive layer 62 thus exposed, can then be folded forward toward the front wall 20 of the envelope and the closure flap 60 can then be pressed against the outer surface of the front wall 20 to close the envelope 10.
  • the closure flap 60 is shown as pressed against the upper portion of the front wall 20 of the envelope 10 with the envelope 10 in a closed position.
  • the adhesive used in the adhesive layer 62 is a pressure sensitive adhesive.
  • any suitable adhesive can be used, such as an adhesive activated by moisture.
  • Suitable adhesives include thermoplastic hot melt adhesives, silicone adhesives, acrylic pressure sensitive adhesives, solvent cast adhesives, UV (ultraviolet) or EB (electron beam) cured acrylic adhesives, and the like. Those skilled in the art will understand and be familiar with the manufacture and application of release tapes on adhesive layers or substrates, and the wide variety of commercially available adhesives for this type of application.
  • the adhesive layer 62 can be the plastic coating which has been heated so that the plastic coating became molten while in contact with both the outer and inner layers 80 and 90 and then solidified so that the outer and inner layers 80 and 90 are bonded together.
  • FIG. 5 depicts a perspective view of an envelope 110 in an open position, where the envelope 110 includes an alternative closure mechanism.
  • the envelope 110 includes a front wall 120, a rear wall 130, a bottom 140, and a mouth 150.
  • the envelope 110 can be constructed by any of the processes disclosed herein, including the adhering of an outer layer 180 to an inner layer 190.
  • the front and rear walls 120 and 130 of the envelope 110 are substantially congruent and of substantially the same size and length.
  • the side edges of the envelope are adhered at side seams 170a and 170b.
  • the alternative closure mechanism 160 is simply a heat seal or a sealing tape. Sealing tapes are conventionally used in providing a closing mechanism for envelopes of various designs. Typically, a pressure sensitive adhesive is applied to the upper portion of the interior side of one of the front or back walls 120 or 130 of the envelope 110. Usually, a release tape covers the adhesive to avoid premature closure of the envelope.
  • the alternative closure mechanism 160 of Fig. 5 is in one embodiment similar in construction and function to the adhesive layer 62 and release liner 64 of Fig. 1, except that no extended flap is necessary.
  • the adhesive portion of alternative closure mechanism 160 can be installed directly on the upper inner surface of the front wall 120 or back wall 130 of the envelope, or can be attached as a discrete tape, by adhesive or heat sealing or the like, to the upper inner surface of the front or back wall.
  • the extended closure flap described elsewhere herein is not needed.
  • the front and back walls 120 or 130 of the envelope 110 in this alternative embodiment can thus be closed at their respective top edges.
  • the methodology for making such an envelope 110 is similar to that described above, except that the laminate will be cut and/or folded such that the front or back walls 120 or 130 have substantially the same length and width.
  • a small portion of the back wall 130, at the top edge thereof, is preferably devoid of the inner layer 190 in order to accommodate the alternative closure mechanism 160.
  • a corresponding upper section of the front wall 120 is preferably devoid of the inner layer 190 in order to accommodate and provide a surface to which the adhesive of the alternative closure mechanism 160 can adhere when closing the envelope 110.
  • the adhesive can be initially positioned on the upper inner surface of front wall 120 instead of the back wall 130.
  • Other closure mechanisms can be suitably selected as appropriate along the upper portions of the envelope 110, including zipper-type or other mechanical closing systems.
  • envelopes may not require a closure at all.
  • the envelope will be constructed as shown in any of Figs. 1 -5, except that there will be no closure mechanism on the envelope.
  • closure systems may be desirable in many cases, the inclusion of a closure system is optional.
  • envelopes can be formed by adhering inner and outer layers together to form a web and then folding the web and adhering the sides of the web to form a mailer.
  • Figs. 6-9 depict instances of an embodiment of forming the envelope 10 in this manner.
  • Fig. 6 depicts the outer layer 80 in the formation of a web 12, which is in a substantially flat (e.g., two-dimensional) form.
  • the outer layer 80 is made entirely or substantially from recycled fiber-based materials (e.g., recycled paper).
  • the outer layer 80 has a weight between about 40 pounds and about 50 pounds (e.g., 45 pounds).
  • the outer layer 80 may be moisture resistant and/or provide a partial air barrier.
  • the outer layer 80 can be coated with a thin polymer-based coating.
  • the coating may be a polyethylene coating having a weight of less than or equal to about 5 pounds per ream of paper of the outer layer 80 (e.g., 3.5 pounds per ream of paper of the outer layer 80).
  • the outer layer 80 is kraft paper formed from post-consumer materials.
  • the outer layer 80 has a first lateral edge 82 and a second lateral edge 84.
  • the outer layer 80 has adhesive layers 86 that are proximate to and substantially parallel to the first and second lateral edges 82 and 84.
  • the adhesive layers 86 can include any suitable adhesive, such as thermoplastic hot melt adhesives, silicone adhesives, pressure sensitive adhesives (e.g., acrylic pressure sensitive adhesives), solvent cast adhesives, UV or EB cured acry lic adhesives, adhesives activated by moisture, and the like.
  • the adhesive layers 86 can be applied to the outer layer 80 by spraying, pouring, dripping, pressing (e.g., in the case of a double-sided adhesive), or any other method.
  • the adhesive layers 86 are hot melt adhesives having a thickness of at least 1 mil (i.e., at least one-thousandth of an inch). In the depicted embodiment, the adhesive layers 86 do not extend across the entire transverse width of the outer layer 80. In some embodiments, the adhesive layers 86 cover less than or equal to one or more of 10% of the surface area of the outer layer 80 or 5% of the surface area of the outer layer 80.
  • Fig. 7 depicts the web 12 with the inner layer 90 adhered to the outer layer 80.
  • the inner layer 90 includes a first lateral edge 92 and a second lateral edge 94.
  • the outer and inner layers 80 and 90 are arranged such that the first lateral edges 82 and 92 are proximate to and substantially parallel to each other and such that the second lateral edges 84 and 94 are proximate to and substantially parallel to each other.
  • the outer and inner layers 80 and 90 are also arranged such that the inner layer 90 covers most of the surface of the outer layer 80, but the portion of the outer layer 80 that makes up the closure flap 60 is not covered by the inner layer 90.
  • the outer and inner layers 80 and 90 are coupled together by pressing the outer and inner layers 80 and 90 that the inner layer 90 adheres to the adhesive layers 86 on the outer layer 80.
  • the inner layer 90 and outer layer 80 are pressed together by passing the web 12 between one or more sets of rollers that counterrotate while the web 12 passes between the rollers.
  • two sets of rollers may be arranged so that each of the adhesive layers 86 passes through a nip between one of the sets of rollers.
  • the rollers in a set of rollers are made from a resilient material (e.g., rubber) and the rollers are arranged in an interference fit to apply force to the outer and inner layers 80 and 90 as the web 12 passes between the rollers.
  • the outer and inner layers 80 and 90 are adhered together near the first and second lateral edges 82, 84, 92, and 94, but the outer and inner layers 80 and 90 are not adhered together between the adhesive layers 86.
  • the inner layer 90 is a formed cushioning layer.
  • the inner layer 90 is a fiber-based material (e.g., paper) that has been cold-formed into a three-dimensional shape.
  • the fiber-based material of the inner layer 90 has a minimum elongation to break of at least 5% in each of the longitudinal and transverse directions so that the cold forming of the inner layer 90 does not tear or break during the cold forming process.
  • the inner layer 90 is formed from a paper material that has a higher weight than a paper material of the outer layer 80.
  • the outer layer 80 may have a weight of less than or equal to 45 pounds per ream and the inner layer 90 can have a weight of greater than or equal to 50 pounds per ream (e.g., 62 pounds per ream).
  • the three-dimensional shape of the inner layer 90 is a pattern of alternating semispherical that protrude from both sides of the plane of the paper.
  • a cross-sectional view of the web 12 is shown in Fig. 10.
  • the inner layer 90 has been cold-formed such that the semispherical shapes altematingly protrude from both sides of the inner layer 90.
  • the pattern of the inner layer 90 can also be seen in the perspective view of the web 12 that is shown in Fig. 11.
  • Such a pattern of a three- dimensional shape in the inner layer 90 can provide a desired about of cushioning.
  • shapes and patterns of the inner layer 90 can also provide cushioning, including patterns where shapes protrude from only one side of the plane, shapes other than hemispheres (e.g., rectangular prisms, tetrahedrons, etc.), or any combination thereof.
  • Fig. 8 depicts the web 12 with adhesive layers 96 applied to the inner layer 90.
  • the adhesive layers 96 are located proximate to and parallel to the first and second lateral edges 92 and 94 of the inner layer 90.
  • the adhesive layers 96 are also located over approximately half of the longitudinal length of the inner layer 90
  • the adhesive layers 96 can be applied to the inner layer 90 by spraying, pouring, dripping, pressing (e.g., in the case of a double-sided adhesive), or any other method.
  • Fig. 12 depicts an example of one of the adhesive layers 96. In Fig. 12, the adhesive has been poured onto the inner layer 90 in a random or pseudo-random pattern.
  • the adhesive can be applied to the inner layer 90 in any other way.
  • the adhesive layers 96 are hot melt adhesives having a thickness of at least 1 mil. In the depicted embodiment, the adhesive layers 96 do not extend across the entire transverse width of the inner layer 90. In some embodiments, the adhesive layers 96 cover less than or equal to one or more of 10% of the surface area of the inner layer 90 or 5% of the surface area of the inner layer 90.
  • Fig. 9 depicts that the web 12 has been folded to form the envelope 10.
  • the fold extends transversely across the web 12 to form the bottom 40 of the envelope 10.
  • the web 12 has been folded such that the transverse ends of the inner layer 90 are substantially aligned.
  • the envelope 10 has been pressed together near the first and second lateral edges 82, 84, 92, and 94 to form the lateral seams 70a, 70b that make up the sides of the envelope 10.
  • the pressing of the sides of the envelope 10 at the adhesive layers 96 cause the inner surfaces of the inner layer 90 to adhere to each other in the lateral seams 70a, 70b.
  • the sides of the envelope 10 are pressed together by passing the envelope 10 between one or more sets of rollers that counterrotate while the envelope 10 passes between the rollers.
  • Fig. 13 depicts a cross-sectional view of the envelope 10 showing how, using the method show n in Figs. 6-9, the lateral seams 70a, 70b of the envelope 10 include two plies of the inner layer 90 sandwiched between two plies of the outer layer 80.
  • each ply of the outer layer 80 is adhered to one ply of the inner layer by the adhesive layer 86 and the two plies of the inner layer 90 are adhered together by the adhesive layer 96.
  • the lateral seams 70a, 70b are secured so that the lateral seams 70a, 70b are unlikely to break, tear, or otherwise fail.
  • the seams of envelopes are the most likely point of failure; the reinforcement of the lateral seams 70a, 70b in the envelope with the adhesive layers 86 and 96 are prevents or significantly reduces the risk of failure of the lateral seams 70a, 70b in the envelope 10.
  • the portions of the outer and inner layers 80 and 90 between the lateral seams 70a, 70b are not adhered to each other.
  • This arrangement allows for gas (e.g., air) to be located between the outer and inner layers 80 and 90 between the lateral seams 70a, 70b.
  • gas e.g., air
  • Having gas between the outer and inner layers 80 and 90 can be an added protection because, in the event of a rip or tear in the outer layer 80 (e.g., while the envelope 10 is being used to ship an object), the inner layer 90 does not also necessarily rip or tear.
  • the method of forming the envelope 10 shown in Figs. 6-9 can be performed manually or in an automated manner.
  • the depictions shown in Figs. 6-9 are indicative of a manual process of forming the envelope 10 where the outer and inner layers 80 and 90 are placed and adhered together and the outer and inner layers 80 and 90 are individual pieces.
  • the envelope 10 can be formed as an in-line process where the outer and inner layers 80 and 90 are part of larger webs that are formed, folded, adhered, and cut automatically.
  • the inner and outer layers of the envelopes can be made from fiber-based materials.
  • the envelopes include some non-fiber-based materials, such as the adhesive in the adhesive layers in the seams, the adhesive on the closure flap, and/or the coating on the outer layer.
  • the percentage of the non-fiber- based materials in an envelope can be less than or equal to about 10%. Having a low percentage of the non-fiber-based materials in the fiber-based envelopes can permit the envelopes to be easily recyclable (e.g., curbside recyclable) despite the presence of non-fiber- based materials.

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Abstract

L'invention concerne une enveloppe comprenant une couche externe et une couche interne qui sont des matériaux à base de fibres. La couche externe a une forme sensiblement plate. La couche interne est accouplée à la couche externe et a une forme sensiblement tridimensionnelle. Les couches externe et interne sont disposées pour former une partie intérieure de l'enveloppe et une embouchure à travers laquelle un objet peut être inséré à l'intérieur de l'enveloppe. L'enveloppe comprend une couture qui comprend deux plis de la couche externe et deux plis de la couche interne pris en sandwich entre les deux plis de la couche externe. Dans la couture, chacun des plis de la couche externe est collé à l'un des plis de la couche interne et les deux plis de la couche interne sont collés l'un à l'autre. Un pourcentage de matériau autre qu'à base de fibres de l'enveloppe est inférieur ou égal à environ 10 %.
PCT/US2023/013616 2022-02-23 2023-02-22 Enveloppes matelassées à base de fibres WO2023163990A1 (fr)

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US202263312854P 2022-02-23 2022-02-23
US63/312,854 2022-02-23

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Citations (5)

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US5662420A (en) * 1995-04-12 1997-09-02 Astro-Valcour, Incorporated Cushioned macerated paper dispatch package
US6845864B2 (en) * 2002-08-13 2005-01-25 Avery Dennison Corporation Versatile CD/DVD type pocket assembly
EP2463088A2 (fr) * 2010-12-08 2012-06-13 Ronald Jones Matériaux de conditionnement matelassés
US20200039720A1 (en) * 2018-08-05 2020-02-06 HexcelPack, LLC Protective Products Such as Envelopes Having a Unique Combination of Interior Padding of Expanded Slit Sheet Paper and Exterior Lining of Embossed Paper
US20200406592A1 (en) * 2018-03-07 2020-12-31 Sealed Air Corporation (Us) Polyethylene recyclable film with high strength and/or barrier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5662420A (en) * 1995-04-12 1997-09-02 Astro-Valcour, Incorporated Cushioned macerated paper dispatch package
US6845864B2 (en) * 2002-08-13 2005-01-25 Avery Dennison Corporation Versatile CD/DVD type pocket assembly
EP2463088A2 (fr) * 2010-12-08 2012-06-13 Ronald Jones Matériaux de conditionnement matelassés
US20200406592A1 (en) * 2018-03-07 2020-12-31 Sealed Air Corporation (Us) Polyethylene recyclable film with high strength and/or barrier
US20200039720A1 (en) * 2018-08-05 2020-02-06 HexcelPack, LLC Protective Products Such as Envelopes Having a Unique Combination of Interior Padding of Expanded Slit Sheet Paper and Exterior Lining of Embossed Paper

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