WO2019215763A1 - Shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof - Google Patents

Shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof Download PDF

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Publication number
WO2019215763A1
WO2019215763A1 PCT/IN2019/050376 IN2019050376W WO2019215763A1 WO 2019215763 A1 WO2019215763 A1 WO 2019215763A1 IN 2019050376 W IN2019050376 W IN 2019050376W WO 2019215763 A1 WO2019215763 A1 WO 2019215763A1
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WO
WIPO (PCT)
Prior art keywords
vegetables
ethylene
shelf
substrate
flowers
Prior art date
Application number
PCT/IN2019/050376
Other languages
French (fr)
Inventor
Sidharth Sareen
Mukul Sareen
Original Assignee
Sidharth Sareen
Mukul Sareen
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 Sidharth Sareen, Mukul Sareen filed Critical Sidharth Sareen
Publication of WO2019215763A1 publication Critical patent/WO2019215763A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
    • A23B7/144—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor
    • A23B7/152—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O ; Elimination of such other gases
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
    • A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
    • A23B7/154—Organic compounds; Microorganisms; Enzymes
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVING, e.g. BY CANNING, MEAT, FISH, EGGS, FRUIT, VEGETABLES, EDIBLE SEEDS; CHEMICAL RIPENING OF FRUIT OR VEGETABLES; THE PRESERVED, RIPENED, OR CANNED PRODUCTS
    • A23B7/00—Preservation or chemical ripening of fruit or vegetables
    • A23B7/14—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10
    • A23B7/153—Preserving or ripening with chemicals not covered by groups A23B7/08 or A23B7/10 in the form of liquids or solids
    • A23B7/157—Inorganic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/74—Oxygen absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/50—Containers, packaging elements or packages, specially adapted for particular articles or materials for living organisms, articles or materials sensitive to changes of environment or atmospheric conditions, e.g. land animals, birds, fish, water plants, non-aquatic plants, flower bulbs, cut flowers or foliage
    • B65D85/505—Containers, packaging elements or packages, specially adapted for particular articles or materials for living organisms, articles or materials sensitive to changes of environment or atmospheric conditions, e.g. land animals, birds, fish, water plants, non-aquatic plants, flower bulbs, cut flowers or foliage for cut flowers

Definitions

  • This invention is directed to shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof.
  • the primary object of the present invention is to provide shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which overcomes disadvantages of the prior arts.
  • Another object of the present invention is to provide shelf- life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which effectively serves the purpose by extending life of fresh fruits and vegetables by upto three times or more comparatively.
  • Still another object of the present invention is to provide shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which is user friendly.
  • Yet another object of the present invention is to provide shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which is cost effective.
  • shelf- life extending sheet for fresh fruits, vegetables and flowers comprising a substrate coated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, sulfur dioxide releasers, which is provided with an over- coat so as to prevent direct contact of chemicals with food.
  • shelf-life extending sheet for fresh fruits, vegetables and flowers comprising a substrate coated with a mixture of a carrier and atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided with an over-coat so as to prevent direct contact of chemicals with food.
  • shelf-life extending sheet for fresh fruits, vegetables and flowers comprising a substrate impregnated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, sulfur dioxide releasers, which is provided with an over-coat so as to prevent direct contact of chemicals with food.
  • one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, sulfur dioxide releasers, which is provided with an over-coat so as to prevent direct contact of chemicals with food.
  • shelf- Life extending sheet for fresh fruits, vegetables and flowers comprising a plurality of substrates, wherein a substrate is impregnated with atleast one of the chemicals selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio-inhibitors and moisture absorbers, sulfur dioxide releasers etc.
  • the substrate thus obtained is sandwitched between the two substrate layers.
  • the substrate is having thickness of 10-300 microns/ 10- 10000 gsm which is selected from paper, plastic, card board sheet, fabric (Non woven fabric or woven fabric made from natural or man made fibres) constituting a carrier for the chemicals.
  • the amount of the chemicals namely ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers is between 0.1 grams per sq meter to 500 grams per sq meter depending upon the end use requirement.
  • Example of chemicals include sodium metabisulfite for releasing sulfur dioxide anti microbial vapors, zeolites for absorbing ethylene gas, activated clay for absorbing moisture, activated alumina for absorbing permanganates which further oxidise ethylene vapors, activated charcoal for absorbing gases, permanganates as ethylene oxidizers, organic acids or silver or copper particels as microbial inhibitors, sodium bi-carbonate as carbon dioxide releaser etc.
  • the carrier includes water, solvent such as methanol, ethanol, butanol, toluene & adhesive made from polyurethane or polyvinyl alcohols for the purpose of coating.
  • the over-coat includes a polymer film or Aluminium film or another sheet of paper or a breathable/ non breathable substrate.
  • a process for manufacturing shelf-life extending sheet for fresh fruits, vegetables and flowers comprising steps of coating of at least one of the chemicals on the substrate followed by over coating by said over coat, wherein the chemical(s) can be mixed with the carrier prior to the step of coating on the substrate.
  • a process for manufacturing shelf-life extending sheet for fresh fruits, vegetables and flowers comprising steps of mixing of atleast one of the chemicals in pulp of the substrate to manufacture the substrate followed by over coating by the over coat.
  • a process for manufacturing shelf-life extending sheet for fresh fruits, vegetables and flowers comprising steps of mixing of at least one of the chemicals together and sandwitching or encapsulating in between 2 or more substrates for single or multiple functions. Finally, the substrates are sealed.
  • the present invention teaches a technology regarding shelf- life extending sheet for fresh fruits, vegetables and flowers.
  • Said sheet comprising a substrate coated with atleast one chemical selected from ethylene adsorbers, Ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/ bio inhibitors and moisture absorbers.
  • the coated substrate can be over-coated with a coat to prevent direct contact of chemicals with food according to first embodiment of present invention.
  • the chemicals can also be encapsulated or sandwitched between multiple layers of substrate.
  • the sheet can be treated or loaded with multiple chemicals each providing a specific functionality thereto.
  • the chemicals also can be used singularly or in any combination thereof.
  • the present invention introduces a single product that enhances shelf life of fresh produce by multiple actions of the chemicals applied.
  • the chemicals can be selected from the above to perform just one function or multiple functions depending upon the requirement for a specific application.
  • the substrate can be selected from paper, plastic, cardboard sheets, fabric (non woven fabric or woven fabric made from natural or man made fibers) or any other material suitable for the purpose of coating and employed as a carrier for the chemicals.
  • the substrate may range in thickness preferably from 10 microns to 300 microns or from 10 gsm to 10000 gsm.
  • the substrate can be coated with ethylene adzorbers to absorb ethylene, oxidizing agents to oxidize ethylene, bio inhibitors to release microbial inhibitors and prevent fungal or bacterial spoilage, carbon dioxide releasers to slow down the oxidation rate by having a high CO2 atmosphere, oxygen absorbers or oxygen reducing agents to reduce surrounding O2 levels and moisture absorbers to reduce moisture which can also cause faster spoilage of the produce when these chemicals come in contact with moisture, O2, CO2 or ethylene within the enclosed packaging.
  • ethylene adzorbers to absorb ethylene
  • oxidizing agents to oxidize ethylene
  • bio inhibitors to release microbial inhibitors and prevent fungal or bacterial spoilage
  • carbon dioxide releasers to slow down the oxidation rate by having a high CO2 atmosphere
  • oxygen absorbers or oxygen reducing agents to reduce surrounding O2 levels
  • moisture absorbers to reduce moisture which can also cause faster spoilage of the produce when these chemicals come in contact with moisture, O2, CO2 or ethylene within the enclosed packaging.
  • the process involves coating the substrate using a methodology including gravure, sprayjet, brush applied, dipping or any other coating that can be implemented to coat the chemicals on paper.
  • the chemical combination selected can be mixed in water, solvent, adhesive or any other carrier and applied on said carrier substrate as a coat.
  • the chemical combination can also be mixed in pulp in the course of manufacturing of the substrate.
  • the chemical(s) are impregnated in the substrate during manufacturing.
  • the chemical combination can also be sandwitched or encapsulated in between plurality of substrates.
  • the coating or dosing can range from 0.1 grams per square meter to 500 grams per square meter depending upon the end use such as type of fresh produce and time period of protection.
  • the coated/ impregnated substrate thus obtained is further coated with the coat as in first embodiment so as to prevent direct contact of chemicals with food.
  • the over-coat includes a polymer film or aluminum film or another sheet of paper or a breathable/non breathable substrate so that these chemicals do not come in direct contact with food.
  • the encapsulated chemical within the substrate is also arranged so that the chemicals do not come in direct contact with the food products.
  • the novel shelf Life Extending sheet provides higher surface area, requires lesser space for installation, is available in different sizes and proves to be cost effective. [0044]
  • the shelf life extension sheet is capable of extending the life of fresh fruits and vegetables by up to 3 times or more compared to unprotected storage.
  • the sheet can be either used to completely wrap the fresh produce, or the said shelf life extending sheet can be placed below or above the fresh produce in a box from where it is able to function within the package’s environment or just dropped as a small strip/strips within the packet or box of fresh produce.

Abstract

The invention relates to shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof comprising a substrate coated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided with an over-coat so as to prevent direct contact of chemicals with food. The chemical(s) can be mixed with a carrier prior to the coating. The substrate can be impregnated with the chemical(s) during manufacturing thereof. Advantageous Features: The novel shelf Life Extending sheet provides higher surface area, requires lesser space for installation, is available in different sizes and proves to be cost effective. The shelf life extension sheet is capable of extending the life of fresh fruits and vegetables by up to 3 times or more compared to unprotected storage.

Description

Shelf-Life Extending sheet for Fresh Fruits, Vegetables and Flowers and a process for preparation thereof
FIELD OF INVENTION [001] This invention is directed to shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof.
BACKGROUND OF THE INVENTION
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[003] The percentage of wastage of fruits, vegetables and flowers is quite high owing to varying temperature conditions, improper storage and handling conditions, distance from the farm to retail and also the long time period involved in the distribution.
[004] Hence, the task of shelf life extension of perishable products is required to be undertaken. [005] Current method includes placement of ethylene adsorbant pouches along with the fresh produce. These only work by absorbing ethylene and provide limited coverage just around the pouch. [006] The pouch also provides limited surface area for adsorption of ethylene as it contains granules or beads of ethylene absorbant media tightly packed together in a sachet providing a total surface area which gets highly reduced when such granules or beads are tightly packed.
[007] Other method involves keeping fresh produce in controlled atmospheres during shipping and monitoring ethylene content in the air.
[008] Thus, the known arts involve some limitations.
[009] In view of the above, it is required to devise an alternative provision so as to address the aforesaid issues and serve the purpose effectively.
OBJECTS OF THE INVENTION
[0010] The primary object of the present invention is to provide shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which overcomes disadvantages of the prior arts.
[0011] Another object of the present invention is to provide shelf- life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which effectively serves the purpose by extending life of fresh fruits and vegetables by upto three times or more comparatively. [0012] Still another object of the present invention is to provide shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which is user friendly. [0013] Yet another object of the present invention is to provide shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof which is cost effective.
[0014] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated. SUMMARY OF THE INVENTION
[0015] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure. [0016] According to this invention, there is provided shelf- life extending sheet for fresh fruits, vegetables and flowers comprising a substrate coated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, sulfur dioxide releasers, which is provided with an over- coat so as to prevent direct contact of chemicals with food.
[0017] Shelf-life extending sheet for fresh fruits, vegetables and flowers comprising a substrate coated with a mixture of a carrier and atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided with an over-coat so as to prevent direct contact of chemicals with food.
[0018] Shelf-life extending sheet for fresh fruits, vegetables and flowers comprising a substrate impregnated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, sulfur dioxide releasers, which is provided with an over-coat so as to prevent direct contact of chemicals with food. [0019] Shelf- Life extending sheet for fresh fruits, vegetables and flowers comprising a plurality of substrates, wherein a substrate is impregnated with atleast one of the chemicals selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio-inhibitors and moisture absorbers, sulfur dioxide releasers etc. The substrate thus obtained is sandwitched between the two substrate layers.
[0020] The substrate is having thickness of 10-300 microns/ 10- 10000 gsm which is selected from paper, plastic, card board sheet, fabric (Non woven fabric or woven fabric made from natural or man made fibres) constituting a carrier for the chemicals.
[0021] The amount of the chemicals, namely ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers is between 0.1 grams per sq meter to 500 grams per sq meter depending upon the end use requirement. [0022] Example of chemicals include sodium metabisulfite for releasing sulfur dioxide anti microbial vapors, zeolites for absorbing ethylene gas, activated clay for absorbing moisture, activated alumina for absorbing permanganates which further oxidise ethylene vapors, activated charcoal for absorbing gases, permanganates as ethylene oxidizers, organic acids or silver or copper particels as microbial inhibitors, sodium bi-carbonate as carbon dioxide releaser etc.
[0023] The carrier includes water, solvent such as methanol, ethanol, butanol, toluene & adhesive made from polyurethane or polyvinyl alcohols for the purpose of coating.
[0024] The over-coat includes a polymer film or Aluminium film or another sheet of paper or a breathable/ non breathable substrate.
[0025] A process for manufacturing shelf-life extending sheet for fresh fruits, vegetables and flowers comprising steps of coating of at least one of the chemicals on the substrate followed by over coating by said over coat, wherein the chemical(s) can be mixed with the carrier prior to the step of coating on the substrate. [0026] Further, a process for manufacturing shelf-life extending sheet for fresh fruits, vegetables and flowers comprising steps of mixing of atleast one of the chemicals in pulp of the substrate to manufacture the substrate followed by over coating by the over coat.
[0027] Further, a process for manufacturing shelf-life extending sheet for fresh fruits, vegetables and flowers comprising steps of mixing of at least one of the chemicals together and sandwitching or encapsulating in between 2 or more substrates for single or multiple functions. Finally, the substrates are sealed.
DETAILED DESCRIPTION OF THE PRESENT INVENTION OF EXAMPLARY EMBODIMENTS
[0028] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure. [0029] The present invention teaches a technology regarding shelf- life extending sheet for fresh fruits, vegetables and flowers. Said sheet comprising a substrate coated with atleast one chemical selected from ethylene adsorbers, Ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/ bio inhibitors and moisture absorbers. The coated substrate can be over-coated with a coat to prevent direct contact of chemicals with food according to first embodiment of present invention.
[0030] The chemicals can also be encapsulated or sandwitched between multiple layers of substrate.
[0031] Here, the sheet can be treated or loaded with multiple chemicals each providing a specific functionality thereto. The chemicals also can be used singularly or in any combination thereof.
[0032] Thus, the present invention introduces a single product that enhances shelf life of fresh produce by multiple actions of the chemicals applied. The chemicals can be selected from the above to perform just one function or multiple functions depending upon the requirement for a specific application.
[0033] The substrate can be selected from paper, plastic, cardboard sheets, fabric (non woven fabric or woven fabric made from natural or man made fibers) or any other material suitable for the purpose of coating and employed as a carrier for the chemicals. The substrate may range in thickness preferably from 10 microns to 300 microns or from 10 gsm to 10000 gsm. [0034] The substrate can be coated with ethylene adzorbers to absorb ethylene, oxidizing agents to oxidize ethylene, bio inhibitors to release microbial inhibitors and prevent fungal or bacterial spoilage, carbon dioxide releasers to slow down the oxidation rate by having a high CO2 atmosphere, oxygen absorbers or oxygen reducing agents to reduce surrounding O2 levels and moisture absorbers to reduce moisture which can also cause faster spoilage of the produce when these chemicals come in contact with moisture, O2, CO2 or ethylene within the enclosed packaging.
[0035] The process involves coating the substrate using a methodology including gravure, sprayjet, brush applied, dipping or any other coating that can be implemented to coat the chemicals on paper.
[0036] Further, according to second embodiment the chemical combination selected can be mixed in water, solvent, adhesive or any other carrier and applied on said carrier substrate as a coat.
[0037] In accordance with third embodiment of present invention, the chemical combination can also be mixed in pulp in the course of manufacturing of the substrate. Thus, the chemical(s) are impregnated in the substrate during manufacturing.
[0038] In accordance with the fourth embodiment of the present invention, the chemical combination can also be sandwitched or encapsulated in between plurality of substrates.
[0039] The coating or dosing can range from 0.1 grams per square meter to 500 grams per square meter depending upon the end use such as type of fresh produce and time period of protection.
[0040] The coated/ impregnated substrate thus obtained is further coated with the coat as in first embodiment so as to prevent direct contact of chemicals with food. [0041] The over-coat includes a polymer film or aluminum film or another sheet of paper or a breathable/non breathable substrate so that these chemicals do not come in direct contact with food. [0042] The encapsulated chemical within the substrate is also arranged so that the chemicals do not come in direct contact with the food products.
WORKING EXAMPLE
Example 1
Sodium Metabisulfite = 2%
Potassium Permanganate = 5%
Zeolite = 10%
Sodium Bi- Carbonate = 2%
Balance = Substrate
Example 2
Sodium Metabisulfite = 10%
Substrate = 90% Example 3
Zeolite = 10%
Potassium Permanganate = 5%
Substrate = 85% Advantageous Features
[0043] The novel shelf Life Extending sheet provides higher surface area, requires lesser space for installation, is available in different sizes and proves to be cost effective. [0044] The shelf life extension sheet is capable of extending the life of fresh fruits and vegetables by up to 3 times or more compared to unprotected storage. Applications
[0045] The sheet can be either used to completely wrap the fresh produce, or the said shelf life extending sheet can be placed below or above the fresh produce in a box from where it is able to function within the package’s environment or just dropped as a small strip/strips within the packet or box of fresh produce.
[0046] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0047] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.
[0048] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term“including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases“at least one” and“one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases“one or more” or“at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or“an” should typically be interpreted to mean“at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogues to“at least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g.,“a system having at least one of A, B and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to“at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g.,“a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of“A” or“B” or“A and B”.
[0049] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details. [0050] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.
[0051] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.
[0052] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Claims

WE CLAIM
1) Shelf- life extending sheet for fresh fruits, vegetables and flowers comprising a substrate coated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided with an over- coat or additional substrate layer/ s so as to prevent direct contact of chemicals with food.
2) Shelf-life extending sheet for fresh fruits, vegetables and flowers comprising a substrate coated with a mixture of a carrier and atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided with an over-coat or additional substrate layer /s so as to prevent direct contact of chemicals with food.
3) Shelf-life extending sheet for fresh fruits, vegetables and flowers comprising a substrate impregnated with atleast one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided with an over- coat so as to prevent direct contact of chemicals with food.
4) Shelf Life extending sheet for fresh fruits, vegetables and flowers comprising a substrate impregnated with at least one chemical selected from ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/bio inhibitors and moisture absorbers, which is provided as a sandwich between substrate sheets to prevent direct contact with the food, alternatively atleast one of the chemicals is encapsulated within substrate sheets.
5) Shelf-life extending sheet for fresh fruits, vegetables and flowers as claimed in the claims 1-4, wherein the substrate is having thickness of 10-300 microns/ 10- 10000 gsm which is selected from paper, plastic, card board sheet, fabric (Non woven fabric or woven fabric made from natural or man made fibres) constituting a carrier for the chemicals.
6) Shelf-life extending sheet for fresh fruits, vegetables and flowers as claimed in preceding claims, wherein the amount of the chemicals, namely ethylene adsorbers, ethylene oxidizers, carbon dioxide releasers, oxygen absorbers or reducers, microbial/ bio inhibitors and moisture absorbers is between 0.1 grams per square meter to 500 grams per sq meter.
7) Shelf-life extending sheet for fresh fruits, vegetables and flowers as claimed in preceding claims, wherein the chemicals include sodium metabisulfite for releasing sulfur dioxide anti microbial vapors, zeolites for absorbing ethylene gas, activated clay for absorbing moisture, activated alumina for absorbing permanganates which further oxidise ethylene vapors, activated charcoal for absorbing gases, permanganates as ethylene oxidizers, organic acids or silver or copper particles as microbial inhibitors, sodium bi carbonate as carbon dioxide releaser. 8) Shelf-life extending sheet for fresh fruits, vegetables and flowers as claimed in claim 2, wherein the carrier includes water, solvent includes methanol, ethanol, butanol, toluene and adhesive made from polyurethane or polyvinyl alcohols for the purpose of coating.
9) Shelf-life extending sheet for fresh fruits, vegetables and flowers as claimed in claim 1-3, wherein the over-coat includes a polymer film or Aluminium film or another sheet of paper or a breathable/non breathable substrate.
10) A process for manufacturing shelf- life extending sheet for fresh fruits, vegetables and flowers as claimed in claim 1 or 2, comprising steps of coating of atleast one of the chemicals on the substrate followed by over coating by said over coat, wherein the chemical(s) can be mixed with the carrier prior to the step of coating on the substrate.
11) A process for manufacturing shelf- life extending sheet for fresh fruits, vegetables and flowers as claimed in claim 3, comprising steps of mixing of atleast one of the chemicals in pulp of the substrate to manufacture the substrate followed by over coating by the over coat.
12) A process for manufacturing shelf- life extending sheet for fresh fruits, vegetables and flowers as claimed in claim 4, comprising steps of mixing of atleast one of the chemicals followed by encapsulation within the substrates and sealing, alternately impregnation of a substrate with atleast one of the chemicals, which is sandwitched between the substrates.
PCT/IN2019/050376 2018-05-11 2019-05-10 Shelf-life extending sheet for fresh fruits, vegetables and flowers and a process for preparation thereof WO2019215763A1 (en)

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IN201811017844 2018-05-11

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10271981A (en) * 1997-01-29 1998-10-13 Kenji Nakamura Packaging material for perishable food
US20040137202A1 (en) * 2002-10-25 2004-07-15 The Procter & Gamble Company Multifunctional adhesive food wraps
US20110300768A1 (en) * 2009-02-20 2011-12-08 Reliance Industries Limited Ethylene adsorbent packaging or barrier material and method of making the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10271981A (en) * 1997-01-29 1998-10-13 Kenji Nakamura Packaging material for perishable food
US20040137202A1 (en) * 2002-10-25 2004-07-15 The Procter & Gamble Company Multifunctional adhesive food wraps
US20110300768A1 (en) * 2009-02-20 2011-12-08 Reliance Industries Limited Ethylene adsorbent packaging or barrier material and method of making the same

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