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
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
  • B65D75/20—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks doubled around contents and having their opposed free margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
• • 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
  • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D65/02—Wrappers or flexible covers
  • B65D65/14—Wrappers or flexible covers with areas coated with 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
  • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
  • B65D31/005—Bags or like containers made of paper and having structural provision for thickness of contents by folding a single blank to U-shape to form the base of the bag and opposite sides of the body-portion, the remaining sides being formed by extensions of one or more of these opposite sides
• • 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
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/18—End- or aperture-closing arrangements or devices using adhesive applied to integral parts, e.g. to flaps
• • 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
  • B65D33/00—Details of, or accessories for, sacks or bags
  • B65D33/16—End- or aperture-closing arrangements or devices
  • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
  • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
• • 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
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/52—Details
  • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
  • B65D75/5855—Peelable seals
• • 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
  • B65D81/32—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 for packaging two or more different materials which must be maintained separate prior to use in admixture
  • B65D81/3261—Flexible containers having several compartments
• • 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
  • B65D2575/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
  • B65D2575/52—Details
  • B65D2575/58—Opening or contents-removing devices added or incorporated during package manufacture
  • B65D2575/586—Opening or contents-removing devices added or incorporated during package manufacture with means for reclosing
• • 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
  • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
  • B65D75/52—Details
  • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture

Definitions

• FIG. 1A is a perspective view of a second form of a resealable package with a flexible sheet in a flat configuration with resealable cohesive adjacent to edges thereof and intermediate resealable cohesive strips;
• FIG. 3 is a perspective view of a roll of flexible material separated into sheets for the resealable package of FIG. 1 by frangible portions extending transversely across the flexible material;
• the sheet 12 is shown as generally rectangular and configured to fold into a generally rectangular sealed package, other suitable shapes can be utilized as mentioned above.
• the sheet 12 can be configured to fold into a triangular sealed package, with corresponding cohesive zones, the sheet can also be generally circular or oval, or other symmetrical shapes.
• FIGS. 4, 4A, and 5 a package 50 is shown having many similarities to the package shown in FIGS. 1, 1A, and 2. Thus, similar reference characters will be utilized for similar features for ease of explanation.
• the package 50 of this form includes the sheet 12 shown in a generally flattened or laid open configuration.
• the sheet 12 is separated into the first portion 14 and the second portion 16 by the fold line or foldable portion 18 extending transversely thereacross.
• the sheet 12 includes the first and second end edges 20, 22, and the first and second opposing side edges 24, 26.
• the first opposing side edges 24 connect to the second opposing side edges 26 at the fold line 18, so that the side edges 24, 26 extend between the end edges 20, 22.
• a user can prepare the package contents, if necessary, lay the contents on the interior surface 64 in either the first or second portion thereof. Then, the user can fold the opposite portion about the fold line 18, generally align the first and second cohesive zones 52, 54 and the mating members 58, 60 and press to seal the first and second package portions 14, 16 together to form a sealed interior 66.
• the package 50 of this form can further have the one or more optional strips 42 of cohesive disposed on the interior surface and extending between the coupling components 58, 60; the one or more symmetric pairs of optional strips 44 of cohesive disposed on the interior surface and extending between the side cohesive portions 56; or combinations thereof, as shown in FIG. 1 A.
• the cohesive can be a UV-cured cohesive with relatively low tack levels to minimize adhesion to the unwanted surfaces, a selected bonding or opening peel strength sufficient to enable secure reclosure of the package 10, 50, and a peel strength robust enough to enable repeated opening and reclosing of the package 10, 50.
• the cohesive also has a strong bond to the film substrate of the sheet 12 so that the cohesive does not delaminate upon opening of the package 10, 50.
• the cohesive may include specific blends of a UV-curable acrylic oligomer and a tack control agent.
• the cohesive may include specific blends of the UV-curable acrylic oligomer, the tack control agent, and an elastomer (rubber) component.
• the cohesive is a UV-cured pressure sensitive cohesive (PSA) exhibiting cohesive properties and low tack, but, despite the low tack, still forms a strong bond to the film substrate forming the opposing inner surfaces of the sheet 12.
• PSA pressure sensitive cohesive
• a cohesive-based material typically adheres more readily to like materials (i.e., self-adhesion) rather than to non-like materials.
• the cohesive is UV-cured, and more preferably a UV-cured PSA cohesive exhibiting cohesive properties and low tack, but forms a strong bond to the film substrate of the sheet 12.
• a cohesive-based material typically adheres more readily to like materials (i.e., self-adhesion) rather than to non-like materials.
• Suitable cohesive materials used herein generally exhibit a relatively low tack to undesired surfaces, a good bond strength to desired surfaces (such as no delaminating from the flexible first and second panels), and relatively good cohesive or self adhesion bond strength to like surfaces to hold a flexible package or pouch closed, but still openable or peelable by hand.
• the multifunctional UV-curable acrylic acid ester is an acrylic acid ester of a vegetable oil having a reactive functionality of 2.0 or greater.
• the UV-curable acrylic oligomer can comprise an epoxidized soybean oil acrylate.
• ACR cohesive component ratio
• the amount of the UV-curable acrylic oligomers used can impact the properties of the final cohesive. For instance, where the amount of the UV-curable acrylic oligomer is too low, based on the preferred ACR, the cure rate of the final cohesive is too slow. On the other hand, where the amount of the UV- curable acrylic oligomer is too high, based on the preferred ACR, the final cohesive may be adequately cured but can have inadequate self adhesion properties to seal and reseal.
• the second component of the cohesive is a tack control agent.
• the cohesive may include about 1 to about 65% by weight of the tack control agent.
• the tack control agent can be present in amounts from about 20 to about 65%.
• the tack control agent can include a tackifying resin or a curable polymer/monomer combination that when cured can produce the desired levels of tack and self-adhering properties appropriate for the reclosable fastener.
• the tack control agent can comprise an aliphatic urethane acrylated oligomer. Many other types of tack control agents suitable for UV-curable PSA cohesives may also be used in the reclosable cohesive system.
• an optional third component of the cohesive is an elastomeric or rubber component.
• the elastomeric component may include at least one curable acrylated (i.e., acrylic modified) or methacrylated esters of a hydroxy-terminated elastomeric polymer (i.e., an elastomeric polyol).
• This elastomeric component can include acrylic-modified polybutadiene, a saturated polybutadiene and/or a flexible polyurethane.
• a methacrylated polybutadiene can be provided.
• the elastomeric material can be provided in amounts of about 0 to about 20% when used in the cohesive.
• At least a portion of the sheet 12, and in some cases an outer layer that contacts the cohesive may include a polymer coating, layer, filler and/or sealant layer to enhance interfacial bonding between the cohesive and the package substrate of the sheet 12.
• the polymer coating may be selected from ethylene vinyl acetate (EVA), a polyolefin (such as polyethylene), or blends thereof. If used, the polymer layer may include the adhesion promoting filler particles.
• the corona treatment of the substrate surface helps to provide for a strong bond between the coating layer and the substrate surface due to the increased surface energy of the substrate surface.
• the combination of the pretreatment with a low concentration of a slip additive and the incorporation of a filler composition within the substrate together result in a strong bond between the reclosable fastener and the substrate.
• the first peel adhesion between the engaged end strips of cohesive 32 is less than the first peel adhesion between the engaged side strips of cohesive 34.
• the first peel adhesion of the end strips of cohesive 32 can be between about 100 gpli and 200 gpli; and the first peel adhesion of the side strips of cohesive 34 can be between about 300 gpli and about 900 gpli.
• the peel adhesion of engaged side strips 34 of cohesive may be about 3 times to about 9 times stronger than the peel adhesion of engaged end strips 32 of cohesive.
• a peel repetition test was performed to test the reseal and peel ability over multiple repetitions. Approximately twenty samples were made; Samples 20 to 35 were made using the cohesive formulation of Sample 17 from Example 4, and Samples 36 to 38 were made using the cohesive formulation of Sample 18 from Example 4. Samples were produced on a commercial scale pilot coating line via the flexographic coating process.
• the liquid cohesive coating system was preheated to 160°F (71°C) and circulated through a chambered doctor blade which was mounted to an engraved chromium oxide ceramic roll.
• the engraved roll (which was also temperature-controlled to 160°F (71°C)) transferred the liquid cohesive coating to a patterned rubber roll.
• the patterned rubber roll in turn transferred the patterned coating to the moving substrate film (i.e., the process illustrated in FIG. 6).
• the film traveled through a 60 ft. long oven section.
• a UV treater consisting of 3 banks of UV lamps, was located at the oven exit.
• the line configuration with the UV zone located at the exit end of the oven resulted in the maximum path length between the coating station where the material was applied and the UV curing station, which maximized the amount of time available for the liquid cohesive coating to flow-out and level, prior to being cured into a cross-linked polymer network. It is believed that, in some cases, a smooth and level coating surface helps to achieve the desired cohesive to cohesive peel force in the fully cured cohesive.
• the first set of peel tests were performed using short intervals between peels, i.e., about three minutes between a peel-reseal cycle.
• Table 10 includes results for this test, where the averages of two samples tested per condition are provided. These results are compared to Sample 19, the PSA-control from Example 4.
• the average peel strength value was an average of five repeated peels on the same sample that were consecutively peeled at intervals of approximately three minutes. Therefore, the first peel was determined and the peel strength value recorded, and the reclosable fastener sample was resealed. After three minutes had passed, the reclosable fastener was peeled apart again and the peel force strength was recorded. The process was repeated until five peels were performed. [00119] The subjective peel force, subjective tack and MEK rub test results were all good for both Samples 17 and 18 regardless of the duration of the cohesive to cohesive contact.
• inventive cohesive-based reclosable fastener Sample 17 from Example 4 was compared to three other inventive cohesive-based reclosable fasteners, Samples 39 to 41, having the formulations as indicated in Table 14.
• Component BR 144 is identified as an acrylic oligomer (BR 144, Bomar Specialties Company, Torrington, CT).
• Component CN 2302 is also identified as an acrylic oligomer (CN 2302, Sartomer Company). All three Samples, 39 to 41 , have incorporated the acrylic oligomer BR 144, with Samples 39 and 40 having two acrylic oligomers and Sample 41 having three acrylic oligomers present in the formulation.
• the initial peel strength i.e., initial peel performed under laboratory conditions, increased for the new formulations by about 30%-300% compared to Sample 17, having only one acrylic oligomer component.
• the rolling ball tack distance increased for the new formulations by more than 300% compared to Sample 17.
• the new formulations having two or more acrylic oligomers had an overall improved performance compared to Sample 17, as evidenced by the rolling ball test and the peel strength test. All samples had excellent cure rates, evidenced by the MEK rub test.
• all of the new sample formulations i.e., Samples 39 to 41, had lower surface tack than Sample 17 and, in particular, Samples 40 and 41 had an even better low surface tack as evidenced by the glass ball easily rolling across the surface of the reclosable fastener and off of the 7 inch long sample.
• a 24-hour delay repeat test was performed using the same four inventive samples from Example 7. The samples were initially peeled apart and opened, the peel force required being measured. Then the samples are resealed and allowed to sit for 24 hours in a controlled environment, i.e., 72F and 50% relative humidity (RH), until they were repeeled and opened again. This is repeated until a total of five data points have been gathered, or for a period of five days.
• a controlled environment i.e., 72F and 50% relative humidity (RH)
• Example 10 a similar test to Example 9 was performed using the four samples described in Example 7; however, after each peel opening the cohesive area was contacted with whole coffee beans, resealed, and allowed to remain closed for 24 hours, and repeeled.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)
• Bag Frames (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (1)

Family

ID=50349940

Family Applications (1)

Country Status (9)

Cited By (3)

Families Citing this family (6)

Citations (8)

Family Cites Families (11)

• 2014
  • 2014-03-06 MX MX2015011862A patent/MX2015011862A/es unknown
  • 2014-03-06 CN CN201480012176.7A patent/CN105121295B/zh not_active Expired - Fee Related
  • 2014-03-06 EP EP14712493.7A patent/EP2969834A1/en not_active Withdrawn
  • 2014-03-06 BR BR112015021013A patent/BR112015021013A2/pt not_active Application Discontinuation
  • 2014-03-06 WO PCT/US2014/021018 patent/WO2014149815A1/en active Application Filing
  • 2014-03-06 RU RU2015132838A patent/RU2616855C1/ru not_active IP Right Cessation
  • 2014-03-06 US US14/775,951 patent/US20160023828A1/en not_active Abandoned
  • 2014-03-06 CA CA2900414A patent/CA2900414C/en not_active Expired - Fee Related
  • 2014-03-14 AR ARP140101123A patent/AR095515A1/es unknown

Patent Citations (8)

Non-Patent Citations (1)

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