CN-121991523-A - Protective package and method of making same

CN121991523ACN 121991523 ACN121991523 ACN 121991523ACN-121991523-A

Abstract

The present disclosure relates to a method of manufacturing a protective packaging material, and a protective packaging material prepared using the disclosed method. Such packaging materials may be biodegradable, compostable and/or renewable.

Inventors

A. Krieger
B. McLeod
T.Huang
K / Getty
K. LUM

Assignees

汉高股份有限及两合公司

Dates

Publication Date: 20260508
Application Date: 20210614
Priority Date: 20200623

Claims (8)

1. The composition is used for the treatment of a cancer, the composition comprises: 1 to 40% by weight of wood fibers; From 5 wt% to 20 wt% of a binder that is polyvinyl alcohol, ethylene vinyl alcohol copolymer, polyvinyl acetate, ethylene vinyl acetate acrylic, dextrin, vinyl acetate-ethylene copolymer, or a combination thereof; 0.2 to 10 wt% of a surfactant that is dioctyl sodium sulfosuccinate, dodecyldimethylamine oxide, stearyl alcohol, glycerol laurate, polysorbate, cetostearyl alcohol, cetyl palmitate, lauryl dimethylamine oxide, cocoamidopropyl betaine, ethanolamine, sorbitol, disodium ethylenediamine tetraacetate, or a combination thereof; 10 to 95% by weight of water, and 0 To 30% by weight of an additive, Wherein the composition is capable of forming an intermediate foam comprising 10 to 95% by volume of air, and 90 to 5% by volume of the composition, and wherein application of dielectric heat to the intermediate foam causes expansion of the intermediate foam in each of the x, y and z directions, thereby forming a super-expanded foam, wherein the dielectric heat is microwaves.
2. The composition of claim 1, wherein the wood fibers are virgin hardwood, virgin softwood, recycled hardwood, recycled softwood, or mixtures thereof.
3. The composition of claim 1, wherein the wood fiber is in the form of kraft pulp.
4. The composition of claim 2, wherein the wood fibers are 500 to 3,000 tens of thousands of fibers per gram.
5. The composition of claim 1 comprising up to 2% by weight of an additive selected from the group consisting of sodium chloride, calcium chloride, magnesium chloride, aluminum nitrate, zirconium ammonium salts, or combinations thereof, of an inorganic ionic salt.
6. The composition of claim 1, comprising up to 30 weight percent of an additive comprising a salt, starch, unexpanded microspheres, expanded microspheres, calcium carbonate, clay, nanocellulose, nanocrystalline cellulose, dye, pigment, defoamer, humectant, wax, phase change material, microencapsulated chemical, plasticizer, cross-linking agent, preservative, polyether compound, or a combination thereof.
7. The composition of claim 1 comprising up to 30% by weight of an additive comprising a rheology modifier selected from the group consisting of waxes, wax dispersions, hydroxyethylcellulose methylcellulose, polyacrylic thickeners, xanthan gum, starch, or combinations thereof.
8. An intermediate foam comprising 10 To 95% by volume of air, and 90 To 5% by volume of the composition according to claim 1.

Description

Protective package and method of making same The application relates to a split application of a Chinese patent application with the name of protective package and a preparation method thereof, wherein the PCT international application PCT/US2021/037210 submitted by 14 months 6 of 2021 enters China national stage at 10 months 10 of 2022, and the Chinese patent application is 202180027568.0. Technical Field The present disclosure relates to a method of making a protective packaging material, and a protective packaging material made using the disclosed method. Background Pad envelopes made from kraft paper and plastic foam are popular in the market today. Such products meet packaging requirements at reasonable cost, however, they pose an environmental hazard because they are not renewable in conventional paper or plastic recycling processes. Thus, most such liner envelopes are discarded in landfills. Pad envelopes containing expandable microspheres offer the option of paper reproducibility, but not all of their components are fully biodegradable, compostable or renewable. There is a need for a light weight, biodegradable, compostable and/or more renewable liner envelope that is available at reasonable market costs. Disclosure of Invention The present disclosure relates to a composition comprising 1 to 40 wt% wood fibers, 0.5 to 20 wt% binder, 0.2 to 10 wt% surfactant, 10 to 95 wt% water, and 0 to 30 wt% additive. Methods of preparing such compositions are also described. The present disclosure also relates to methods of preparing wood fiber containing foams (foams), including intermediate foams and super-expanded foams, which may be used, for example, in the manufacture of cushion packaging materials, which are also described. Drawings Fig. 1A, 1B, and 1C depict the compositions of the present disclosure prior to mixing (1A), during mixing (1B), and after mixing and aerating to prepare an intermediate foam (INTERMEDIATE FOAM). Fig. 2 depicts a foam comprising a regenerated fiber sample that has been dried in a conventional oven. See example 5. Fig. 3 depicts an embodiment of the present disclosure comprising a 2 inch long intermediate foam pattern that has been heated using microwaves to produce a super-expanded foam (see also example 7). Fig. 4A depicts a "wet" ("middle") foam composition of the present disclosure placed on a paper substrate. Fig. 4B depicts the intermediate foam composition of fig. 4A that has been heated by microwaves to produce a super-expanded foam that exhibits expansion in the x, y, and z directions. Fig. 5A depicts a "wet" ("middle") foam composition (1 g,2 inch wet line) of the present disclosure. Fig. 5B depicts the intermediate foam composition of fig. 5A that has been heated by microwaves to produce a super-expanded foam. Fig. 6 depicts the foam application pattern of the present disclosure on a web (paper) substrate that has been super-expanded, long lines (0.56 g middle foam), short lines (0.19 g middle foam), and a thickness of the laminate with paper of about 0.1 to 0.15 inches. Fig. 7 depicts an embodiment of the present disclosure of a microwave treated super-expanded foam (see also example 5). Fig. 8 depicts an embodiment of the present disclosure showing an overall size reduction of the 0.5g dots of the intermediate foam of the present disclosure, due at least in part to the increased density and gassing of the intermediate foam. (left-before NaCl addition; right-after NaCl addition) (see also example 6). Fig. 9 depicts an embodiment of the present disclosure that is a 0.25 g spot of the intermediate foam of the present disclosure after microwave drying (see also example 8). Fig. 10A depicts a preferred super-expanded foam of the present disclosure that is microwave treated, comprising 5 wt% recycled fibers and 5 wt% softwood fibers (see also example 10). Fig. 10B depicts an embodiment of the present disclosure that includes 5 wt% regenerated fibers and 5 wt% softwood fibers treated with convection heat (conventional oven) (see also example 10). Fig. 11A depicts an intermediate foam (0.25 g wet element) of the present disclosure (see also example 11). Fig. 11B depicts the super-expanded foam of the present disclosure (0.25 g element, left: 100% microwave power for 30 seconds; right: 30% microwave power for 60 seconds) (see also example 11). Detailed Description Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Where a range of values is provided, it is understood that each intervening value, to the tenth of the unit of the lower limit unless the context clearly dictates otherwise (e.g., where a group comprising multiple carbon atoms, each carbon atom number falling within that range is