Silage film, wrapped fodder, and storage method of fodder

Patent metadata

Field	Value
Publication number	US-10814596-B2
Application number	US-201515529562-A
Country	US
Kind code	B2
Filing date	Nov 25, 2015
Priority date	Nov 28, 2014
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A silage film having at least one layer of a resin composition containing an ethylene-vinyl alcohol copolymer (A) and a hydroxy group-containing compound (B). In the resin composition containing the ethylene-vinyl alcohol copolymer (A) and the hydroxy group-containing compound (B), the hydroxy group-containing compound (B) has a molecular weight of less than or equal to 200, a ratio of number of hydroxy groups per molecule to the molecular weight ranging from 0.02 to 0.03, and a melting point of greater than or equal to 23° C., and a content of the hydroxy group-containing compound (B) in the resin composition ranging from 3% to 15% by mass. The silage film has excellent oxygen barrier property and stretchability (suitability for wrapping) and can be suitably used for long-term storage of silage.

First claim

The invention claimed is:

1. A silage film, comprising:
at least one layer of a resin composition consisting essentially of an ethylene-vinyl alcohol copolymer (A) and a hydroxy group-containing compound (B),
wherein said hydroxy group-containing compound (B) has a molecular weight less than or equal to 200, and a ratio of number of hydroxy groups per molecule to the molecular weight ranging from 0.02 to 0.03, and a melting point ranging from 23° C. to 200° C., wherein a content of the hydroxy group-containing compound (B) in the resin composition ranges from 3% to 15% by mass, and
wherein said ethylene-vinyl alcohol copolymer (A) has an ethylene content ranging from 20 mol % to 60 mol %.

2. The silage film according to claim 1 , wherein the melting point of said hydroxy group-containing compound (B) ranges from 23° C. to 100° C.

3. The silage film according to claim 1 , wherein said hydroxy group-containing compound (B) has a ratio of number of hydroxy groups per molecule to the molecular weight ranging from 0.022 to 0.025.

4. The silage film according to claim 1 , wherein said hydroxy group-containing compound (B) is 1,1,1-trimethylolpropane.

5. The silage film according to claim 1 , wherein the content of said hydroxy group-containing compound (B) in said resin composition ranges from 5% to 10% by mass.

6. The silage film according to claim 1 , wherein said ethylene-vinyl alcohol copolymer (A) has an ethylene content ranging from 25 mol % to 55 mol %.

7. The silage film according to claim 1 , wherein a total layer thickness of the silage film ranges from 5 μm to 200 μm and a thickness ratio of the layer of said resin composition in the total layer thickness ranges from 1% to 20%.

8. The silage film according to claim 1 , further comprising a polyolefin resin layer on at least one side of the layer of said resin composition.

9. The silage film according to claim 1 , wherein the layer of said resin composition is an intermediate layer.

10. A wrapped fodder comprising the silage film according to claim 1 .

11. A storage method, comprising storing fodder with the wrapped fodder according to claim 10 .

12. The silage film according to claim 1 , wherein said ethylene-vinyl alcohol copolymer (A) has an ethylene content ranging from 40 mol % to 50 mol %.

13. The silage film according to claim 1 , wherein the content of said hydroxy group-containing compound (B) in said resin composition ranges from 5% to 8% by mass.

14. The silage film according to claim 1 , wherein said ethylene-vinyl alcohol copolymer (A) has a saponification degree of greater than or equal to 90 mol %.

15. The silage film according to claim 1 , wherein said ethylene-vinyl alcohol copolymer (A) has a saponification degree of greater than or equal to 95 mol %.

16. The silage film according to claim 1 , wherein said ethylene-vinyl alcohol copolymer (A) has a 1,2-glycol bonded amount of less than 1.5 mol %.

17. The silage film according to claim 1 , wherein said ethylene-vinyl alcohol copolymer (A) has a 1,2-glycol bonded amount of less than 1.0 mol %.

18. The silage film according to claim 1 , wherein the resin composition consists of the ethylene-vinyl alcohol copolymer (A), the hydroxy group-containing compound (B), and optionally at least one additive selected from the group consisting of a heat stabilizer, an antioxidant, an antistatic agent, a colorant, an ultraviolet absorber, a lubricant, a plasticizer, a light stabilizer, a surfactant, an antimicrobial agent, a desiccating agent, an anti-blocking agent, a flame retardant, a crosslinking agent, a curing agent, a foaming agent, a nucleating agent, an anti-fogging agent, a silane coupling agent, and an oxygen absorbent.

19. A silage film, comprising:
at least one layer of a resin composition comprising from an ethylene-vinyl alcohol copolymer (A) and a hydroxy group-containing compound (B),
wherein said hydroxy group-containing compound (B) has a molecular weight less than or equal to 200, and a ratio of number of hydroxy groups per molecule to the molecular weight ranging from 0.02 to 0.03, and a melting point of greater than or equal to 23° C.,
wherein a content of the ethylene-vinyl alcohol copolymer (A) in the resin composition ranges from 85% to 97% by mass,
wherein a content of the hydroxy group-containing compound (B) in the resin composition ranges from 3% to 15% by mass, and
wherein said ethylene-vinyl alcohol copolymer (A) has an ethylene content ranging from 20 mol % to 60 mol %.

Assignees

• Kuraray Co

Inventors

• Chow Edgard
• Hirose Wataru

Classifications

• A01F2015/0745

  Special features of the wrapping material for wrapping the bale · CPC title

• A01F25/13

  Coverings (A01F25/14 takes precedence) · CPC title

• B32B2410/00

  Agriculture-related articles · CPC title

• B32B2250/42

  Alternating layers, e.g. ABAB(C), AABBAABB(C) · CPC title

• B32B2250/246

  All polymers belonging to those covered by groups B32B27/32 and B32B27/30 · CPC title