Fruit and vegetable anti-fog packaging bag

Patent metadata

Field	Value
Publication number	US-2020198863-A1
Application number	US-201916678857-A
Country	US
Kind code	A1
Filing date	Nov 8, 2019
Priority date	Dec 25, 2018
Publication date	Jun 25, 2020
Grant date	—

Abstract

A fruit and vegetable anti-fog packaging bag, which is produced with a polypropylene multilayer film, is manufactured by a high-speed bag making machine.

First claim

What is claimed is:

1 . A fruit vegetable anti-fog packaging bag, which is produced with a three-layer laminated polypropylene multilayer film with a total thickness of 15-80 μm, wherein the polypropylene multilayer film has a heat seal layer laminated underneath, a surface layer or heat seal layer laminated the top, and a substrate layer sandwiched between the heat seal layer and the surface layer or the heat seal layer, characterized in that:
the heat seal layer is produced with at least one selected from the group consisting of propylene-ethylene-butene copolymer and propylene-butene copolymer, and the surface of the heat seal layer is treated with corona;
the substrate layer is produced with at least one selected from the group consisting of propylene and propylene-butene copolymer, and the substrate layer includes 1-10 wt % of anti-fogging agent; and
the surface layer is produced with at least one selected from the group consisting of propylene, propylene-ethylene-butene copolymer and propylene-butene copolymer.

2 . The fruit and vegetable anti-fog packaging bag according to claim 1 , wherein based on the total thickness of the polypropylene multilayer film, the heat seal layer accounts for 4-10%, the substrate layer accounts for 80-92%, and the surface layer accounts for 4-10%.

3 . The fruit and vegetable anti-fog packaging bag according to claim 1 , wherein the anti-fogging agent is one or more selected from the group consisting of glycerin fatty acid esters, sorbitan fatty acid esters, glycerin monoesters, and sorbitan monoester ethylene oxide adducts.

4 . The fruit and vegetable anti-fog packaging bag according to claim 2 , wherein the anti-fogging agent is one or more selected from the group consisting of glycerin fatty acid esters, sorbitan fatty acid esters, glycerin monoesters, and sorbitan monoester ethylene oxide adducts.

5 . The fruit and vegetable anti-fog packaging bag according to claim 3 , wherein the heat seal layer further includes 1-10 wt % of resin based on the total weight of the heat seal layer, and the lowest melting point of the resin is from 70° C. to 90° C.

6 . The fruit and vegetable anti-fog packaging bag according to claim 4 , wherein the heat seal layer further includes 1-10 wt % of resin based on the total weight of the heat seal layer, and the lowest melting point of the resin is from 70° C. to 90° C.

7 . The fruit and vegetable anti-fog packaging bag according to claim 5 , wherein the heat sealing strength of the heat seal layer is equal to or greater than 3.5N/15 mm.

8 . The fruit and vegetable anti-fog packaging bag according to claim 6 , wherein the heat sealing strength of the heat seal layer is equal to or greater than 3.5N/15 mm.

9 . The fruit and vegetable anti-fog packaging bag according to claim 3 , wherein the substrate layer further includes 1-5 wt % of resin based on the total weight of the substrate layer, and the lowest melting point of the resin is from 70° C. to 90° C.

10 . The fruit and vegetable anti-fog packaging bag according to claim 4 , wherein the substrate layer further includes 1-5 wt % of resin based on the total weight of the substrate layer, and the lowest melting point of the resin is from 70° C. to 90° C.

11 . The fruit and vegetable anti-fog packaging bag according to claim 3 , wherein the surface layer further includes 1-10 wt % of resin based on the total weight of the surface layer, and the lowest melting point of the resin is from 70° C. to 90° C.

12 . The fruit and vegetable anti-fog packaging bag according to claim 4 , wherein the surface layer further includes 1-10 wt % of resin based on the total weight of the surface layer, and the lowest melting point of the resin is from 70° C. to 90° C.

13 . The fruit and vegetable anti-fog packaging bag according to claim 1 , wherein the heat seal layer further includes 1-7 wt % inorganic particles based on the total weight of the heat seal layer, and the inorganic particles are one or more selected from the group consisting of silica, talc, and mica with a particle size between 0.2 μm and 10 μm.

14 . The fruit and vegetable anti-fog packaging bag according to claim 1 , wherein the surface layer further includes 1-7 wt % inorganic particles based on the total weight of the surface layer, and the inorganic particles are one or more selected from the group consisting of silica, talc, and mica with a particle size between 0.2 μm and 10 μm.

Assignees

• Nanya Plastics Corp

Inventors

• Liao Te-Chao
• Yuan Ching-Yao
• Cheng Wen-Jui
• Ma Teng-Ko
• Wang Chih-Feng

Classifications

• B32B2307/31

  Heat sealable · CPC title

• B32B27/16

  specially treated, e.g. irradiated · CPC title

• B32B2439/70

  Food packaging · CPC title

• B32B2307/306

  Resistant to heat · CPC title

• B32B2307/746

  Slipping, anti-blocking, low friction · CPC title