Description:FIELD OF INVENTION

[001] The present invention relates to packing solutions designed for sustainable paper bag. Particularly, the present invention relates to a two layer structure recyclable bag with temper evident seal, thereby providing high strength and tampering detection in packaging so as to insure integrity of goods during transportation and storage.
BACKGROUND OF THE INVENTION

[002] In the dynamic landscape of e-commerce, the significance of packaging cannot be overstated. As consumers increasingly turned to online shopping for convenience, efficiency, and a wider selection of products, the role of packaging extends beyond mere protection during transit. Packaging plays a crucial role across various industries, serving not only as a means of product protection but also as a vital component of brand identity, consumer experience, and environmental sustainability. However, the evolution of packaging in the digital age, particularly in e-commerce, has brought to light several pressing challenges that demand innovative solutions.

[003] One significant issue is the widespread non-recyclability of packaging materials. Tradition packaging material such as plastic bag, bubble wrap, and Styrofoam contribute significantly to environmental pollution and waste accumulation. With the exponential growth of online shopping, the volume of packaging material used has surged, exacerbating these environmental concerns. Additionally, the reliance on imported packaging materials further increases the carbon footprint of packaging operations, underscoring the urgency for sustainable alternatives.

[004] Another critical challenge is the lack of effective tamper-evident packaging solutions. Across industries, ensuring product integrity during transit is essential to prevent theft, tampering, or damage. However, existing packaging solution often lack robust tamper detection mechanisms, leaving product vulnerable to manipulation or theft. This compromises consumer trust and poses significant risk of damage to brand reputation and product safety.

[005] Furthermore, the absence of cost effective packaging designs with both low cost and high strength poses a significant challenge. Many existing solutions compromise either affordability or durability, limiting options for businesses seeking optimal packaging solutions. This dilemma leads to increased production costs and environmental impact, as companies often resort to over-engineered or excessive packaging to ensure product protection.

[006] There are several patent applications that disclose a bag for containing goods. One such United States patent application US4096987A discloses a reinforced paper bag of the type found in grocery stores, which is reinforced by a plurality of narrow pleats extending lengthwise of the bag, the bag having corner defining pleats and additional pleats intermediate the corners of the bag, the pleats being folded down and secured to the bag material, preferably with the intermediate pleats adhered in a manner which permits them to expand under load, the pleats adding strength to the bag and permitting the use of lighter weight paper stock, thereby achieving savings in paper requirements as well as increased bag strength. However, these bags neither have adequate security features and nor it is designed for heavy weights and high stress supply chain.

[007] In order to overcome the problem associated with state of arts, there is a need for the development of a recyclable paper bag with tamper evident seal that can overcome the aforesaid limitations in a more efficient manner.

OBJECTIVE OF THE INVENTION

[008] The primary objective of the present invention is to provide a recyclable bag for containing goods.

[009] Another objective of the present invention is to provide a bag with cotton reinforcement for higher strength.

[0010] Another objective of the present invention is to provide a bag with tamper evident seal for tampering detection

[0011] Yet another objective of the present is to provide a packaging bag that reduces overall packing cost.

[0012] Yet another objective of the present invention is to provide a bag that acts as a replacement for corrugated carton.

[0013] Yet another objective of the present is to provide an environment-friendly packaging bag for ensuring sustainability.

[0014] Yet another objective of the present invention is to provide a bag that provides high tensile strength, high tear value, and high tensile energy absorption in both machine direction and cross direction.

[0015] Other objectives and advantages of the present invention will become apparent from the following description taken in connection with the accompanying drawings, wherein, by way of illustration and example, the aspects of the present invention are disclosed.

BRIEF DESCRIPTION OF DRAWINGS
[0016] The present invention will be better understood after reading the following detailed description of the presently preferred aspects thereof with reference to the appended drawings, in which the features, other aspects and advantages of certain exemplary embodiments of the invention will be more apparent from the accompanying drawing in which:

[0017] Figure 1 illustrates a schematic diagram of a recyclable bag with tamper evident seal for containing goods.

SUMMARY OF THE INVENTION
[0018] The present invention relates to a recyclable paper bag that provides high strength and tampering detection. The recyclable bag comprises of two panels made from Kraft paper laminated with a mesh of cotton threads, ensuring strength and eco-friendliness. The recyclable bag comprises a gusset connected to the panels for increased volume. The bag is striped with an adhesive strip on one panel and perforation on other panel, forming a tamper evident seal. The present invention provides a method of manufacturing of the recyclable bag for containing goods. The manufacturing method comprising steps of: lamination, slitting, adhesive application, perforation, sealing, and cutting, producing a sturdy, tamper resident, and recyclable packaging solution.

DETAILED DESCRIPTION OF INVENTION
[0019] The following detailed description and embodiments set forth herein below are merely exemplary out of the wide variety and arrangement of instructions which can be employed with the present invention. The present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. All the features disclosed in this specification may be replaced by similar other or alternative features performing similar or same or equivalent purposes. Thus, unless expressly stated otherwise, they all are within the scope of the present invention.

[0020] Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0021] The terms and words used in the following description and claims are not limited to the bibliographical meanings but are merely used to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention.

[0022] It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise.

[0023] It should be emphasized that the term “comprises/comprising” when used in this specification is taken to specify the presence of stated features, integers, steps, or components but does not preclude the presence or addition of one or more other features, integers, steps, components, or groups thereof.

[0024] Accordingly, the present invention relates to paper bags. Particularly, the present invention relates to a two-layer structure recyclable bag for containing goods with tamper evident seal, thereby providing high strength and securing the goods inside the bag from tampering.
[0025] In a preferred embodiment of the present invention, as illustrated in figure 1, the recyclable bag for containing goods comprises a first panel (102), a second panel (104), and a gusset (106) connecting the first panel (102) and second panel (104) wherein the first panel (102) and the second panel (104) are delimiting the containment volume of the bag (100).

[0026] The first panel (102) and the second panel (104) are constructed from Kraft paper laminated with mesh of cotton threads providing a two layer structure for strength and durability. The first panel (102) comprises of a first top side, a first bottom side, and a first pair of longitudinal sides. The second panel (104) comprises of a second top side, a second bottom side, and a second pair of longitudinal sides. The first pair of longitudinal sides of the first panel (102) are adhered to the second pair of the longitudinal sides of second panel (104) through adhesive, ensuring structural integrity.

[0027] In a preferred embodiment of the present invention, the adhesive used to adhere the first pair of longitudinal sides of the first panel (102) to the second pair of the longitudinal sides of second panel (104) may be cold glue adhesive. Alternatively, the adhesive may also comprise of, but not limited to hot melt adhesive, epoxy adhesive, pressure adhesive, glue, hot glue, dispersion adhesive, and the like.

[0028] The first pair of longitudinal side of the first panel (102) is adhered to the second pair of the longitudinal sides of second panel (104) through a side gusset to extend the volume of the bag. The first top side of the first panel (102) comprises an adhesive strip with releasable liner paper and the second top side of the second panel (104) comprises of perforation. The first top side of the first panel (102) is adhered to the second top side of the second panel (104) through coupling of the adhesive strip of the first panel (102) with perforation of the second panel (104) after removal of the releasable liner paper from the adhesive strip Removing the liner paper allows the adhesive strip to adhere to the perforated area, forming a tamper-evident seal.

[0029] The gusset adds space and strength to the bag, enabling it to stand upright on a flat surface. The bag may includes side gussets, bottom gussets, or both, for increased fillable space when opened.

[0030] In a preferred embodiment, the gusset (106) connects the first panel (102) with second panel (104). The gusset (106) is connected to the first bottom side of the first panel (102) and the second bottom side of the second panel (104). The gusset (106) is an additional piece of material that adds more space to a bag and is utilized to offer extra strength to the bag (100). The gusset (106) enables the bag (106) to sit upright on its own on a flat surface.

[0031] In an exemplary embodiment of the present invention, the recyclable bag may have different dimensions. As per this embodiment, the length of the first panel (102) and the second panel (104) as 371mm. The breadth of gusset (106) is 100mm. The side sealing width of the first pair of longitudinal sides of the first panel (102) and the second pair of longitudinal sides of the second panel (104) is 12mm. The width of hot melt adhesive strip formed on the first top of the first panel (102) is 22mm. The width of perforation formed on the second top of the second panel (104) in 22mm.

[0032] Manufacturing involves laminating Kraft paper and cotton thread mesh using lamination and printing machine to enhance strength and appearance. A pouch making machine forms laminated rolls into pouches, while a hot melt adhesive station applies adhesives to first panel top side. A heat sealer then seals the longitudinal side using heat and pressure.

[0033] In an embodiment, the lamination and printing machine is used to bond layers of the Kraft paper and the mesh of cotton threads together to enhance their strength, durability, and appearance. The lamination and printing machine involves applying adhesive between layers of the Kraft paper and the mesh of cotton threads and then pressing them together under heat and pressure to form laminated roll for manufacturing the bag (100).

[0034] In another embodiment of the present invention, a pouch making machine is used to produce the bag (100). It typically takes laminated rolls of the Kraft paper and cotton thread and form them into pouches of different shapes and sizes. The machine performs operation like sealing, cutting, filling, and the like.

[0035] In yet another embodiment of the present invention, a hot melt adhesive station is attached with the pouch making machine. The hot melt adhesive station is used to apply adhesive onto the first top of the first panel (102) for bonding purpose. The hot melt adhesive station is configured to melt solid adhesive into a liquid state, applies the adhesive to the first top of the first panel (102) via nozzle, and rapidly solidifies to form strong bonds.

[0036] In yet another embodiment of the present invention, a heat sealer is used for sealing through heat and pressure to seal the first pair of longitudinal sides of the first panel (102) with the second pair of longitudinal sides of the second panel (104) through adhesive. The heat sealer consists of a heating element, sealing jaws, and temperature controls to perform sealing operation wherein the heating element melts adhesive, the sealing jaw applies pressure to join the first pair of longitudinal sides of the first panel (102) and the second pair of longitudinal sides of the second panel (104) together, and the temperature control manages the temperature of the heating element.

[0037] The bag (100) has following properties:-
a. The strength of Kraft paper used to manufacture the bag (100) may be of range 60gsm/24bf (gram per square meter)/ (burst factor);
b. The mesh of cotton thread used to laminate Kraft paper may be of weight in range 10 gsm (gram per square meter);
c. Lamination adhesive used to join the mesh of cotton thread with Kraft paper may be of weight in of range 15gsm;
d. a TEA(tensile energy absorption) index of the bag (100) in MD (machine direction) direction is of range 350J/g;
e. a TEA index of the bag (100) in CD (cross direction) direction is of range 400 J/g;
f. Strength of the adhesive seal used to seal the first pair of longitudinal sides of first panel (102) to the second pair of longitudinal sides of the second panel (104), may be in range of 1100gm/25mm;
[0038] In an embodiment, the present invention also provides a method for manufacturing of the recyclable bag for containing goods, comprises the following steps:-
• mounting of Kraft paper reel and cotton mesh reel on the lamination and printing machine;
• preparation of a laminated roll through lamination of Kraft paper with cotton mesh through adhesive in the lamination and printing machine;
• slitting side of the laminated roll through a slitting machine and run through guiding blades and slit;
• mounting of the slit roll in the pouch making machine;
• passing of roll through the pouch making machine;
• dispensing of hotmelt adhesive from the hotmelt adhesive station to form adhesive strip with releasable liner paper on the first top side of the first panel (102);
• performing of perforation on the second top side of the bag by perforation panel through punching of male & female blades of the second panel (104);
• sealing of the first pair of longitudinal sides of the first panel (102) with the second pair of longitudinal sides of the second panel (104) by melting adhesive through the heat sealer; and
• cutting and collection of the recyclable bag (100) coming out of the pouch making machine.
[0039] In an embodiment the advantages of the present invention are enlisted herein:
• The present invention provides a two layer structure bag with cotton reinforcement, thereby providing high strength.
• The present invention provides a bag with tamper evident seal, thereby providing tampering detection.
• The present invention provides a packaging bag that reduce overall packing cost.
• The present invention provides a bag that acts as a replacement of corrugated carton.
• The present invention provides a packaging bag that is environment friendly, thereby ensuring sustainability.
• The present invention provides a bag that provides high tensile strength, high tear value and high tensile energy absorption in both machine direction and cross direction.
• The present invention provides a bag that is capable of carrying heavy weights and performs well in high stress supply chain.

[0040] While this invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.
, Claims:WE CLAIM:

1. A recyclable bag for containing goods (100), comprising:
(a) a first panel (102) comprising a first top side, a first bottom side, and a first pair of longitudinal sides;
(b) a second panel (104) comprising a second top side, a second bottom side, and a second pair of longitudinal sides; and
(c) a gusset (106) connected to the first bottom side of the first panel (102) and the second bottom side of the second panel (104);
wherein,
i. the first panel (102) and the second panel (104) are composed of Kraft paper laminated with a mesh of cotton threads;
ii. the first pair of longitudinal sides of the first panel (102) are adhered to the second pair of the longitudinal sides of the second panel (104) through adhesive;
iii. the first top side of the first panel (102) comprises a adhesive strip with releasable liner paper;
iv. the second top side of the second panel (104) comprises of perforation; and
v. the first top side of the first panel (102) is adhered to the second top side of the second panel (104) to form a tamper evident seal through coupling of the adhesive strip of the first panel (102) with perforation of the second panel (104) after removal of releasable liner paper.

2. The bag (100) as claimed in claim 1, wherein the bag (100) has following properties:-
a. Strength of the Kraft paper used to manufacture the bag (100) is in a range of 60gsm/35bf – 100gsm/70bf (gram per square meter)/ (burst factor)
b. the mesh of cotton thread laminated to the Kraft paper is of weight in a range of 9 gsm - 25 (gram per square meter)
c. lamination adhesive joined with the mesh of cotton thread of the Kraft paper is of weight in a range of 15gsm-25 gsm.
d. a tensile energy absorption (TEA) index of the bag (100) in machine direction is in a range 250J/g- 450J/g.
e. the TEA index of the bag (100) in cross direction (CD) is in range of 400 J/g – 650J/g
f. strength of the adhesive seal used to seal the first pair of longitudinal sides of first panel (102) to the second pair of longitudinal sides of the second panel (104) is in range of 900gm/25mm – 1400 gm/25mm;
3. The bag (100) as claimed in claim 1, wherein the adhesive strip of the first panel (102) is coupled with perforation of the second panel (104) after removal of the releasable liner paper.
4. The bag (100) as claimed in claim 1, wherein the adhesive strip is a hot melt adhesive strip.
5. A method of manufacturing of the recyclable bag for containing goods, comprises:
• mounting of Kraft paper reel and cotton mesh reel on a lamination and printing machine;
• preparing a laminated roll through lamination of Kraft paper with cotton mesh through adhesive in the lamination and printing machine;
• slitting side of the laminated roll through a slitting machine and run through guiding blades and slit;
• mounting of the slit roll in the pouch making machine;
• passing of roll through the pouch making machine;
• dispensing of hotmelt adhesive from the hotmelt adhesive station to form adhesive strip with releasable liner paper on the first top side of the first panel (102);
• performing of perforation on the second top side of the bag by perforation panel through punching of male & female blades of the second panel (104);
• sealing of the first pair of longitudinal sides of the first panel (102) with the second pair of longitudinal sides of the second panel (104) by melting adhesive through the heat sealer; and
• cutting and collection of the recyclable bag (100) coming out of the pouch making machine.
6. The method as claimed in claim 6, wherein the first panel (102) and the second panel (104) are delimiting the containment volume of the bag (100);
7. The method as claimed in claim 6, wherein the adhesive strip of the first panel (102) is coupled with perforation of the second panel (104) after removal of the releasable liner paper.
8. The method as claimed in claim 6, wherein the pouch making machine is attached with hot melt adhesive station.