Chemical product packaging film

Patent metadata

Field	Value
Publication number	US-10450118-B2
Application number	US-201615562027-A
Country	US
Kind code	B2
Filing date	Mar 31, 2016
Priority date	Apr 15, 2015
Publication date	Oct 22, 2019
Grant date	Oct 22, 2019

Abstract

Provided is a film for packaging chemicals which does not change in appearance (e.g. yellowing), or does not generate odor, even after long-term storage; which is prevented from being scratched or contaminating rolls when the film is drawn from a roll thereof; and which expresses excellent chemical resistance. Also provided is a film for packaging chemicals which is easily detachable from a heat seal plate when contents are packed and sealed therein. The film for packaging chemicals includes polyvinyl alcohol; and a surfactant, the amount of the surfactant being 0.9% to 5% by mass based on 100% by mass of the polyvinyl alcohol, the surfactant having a polyoxyethylene structure, the number of moles of oxyethylene groups in the surfactant being 5 to 13 mol, the surfactant having a HLB of 9 to 14.5.

First claim

The invention claimed is:

1. A film for packaging chemicals, comprising:
polyvinyl alcohol; and
a nonionic surfactant,

wherein,
the amount of the surfactant is 0.9% to 4.6% by mass based on 100% by mass of the film for packaging chemicals,
the surfactant is a polyoxyethylene alkyl phenyl ether,
the number of moles of oxyethylene groups in the surfactant is 5 to 13 mol,
the surfactant has a HLB of 9 to 14.5,
the polyvinyl alcohol is modified by at least one hydrophilic group selected from the group consisting of a sulfonic acid groups, a pyrrolidone ring group, an amino group, and a carboxyl group, and
a peel strength between the film and a SUS plate is less than 0.15 N/15 mm when the film is heat sealed to the SUS plate at 150° C.

2. The film for packaging chemicals according to claim 1 ,
wherein a 7% by mass aqueous solution of the film has a pH of 2.0 to 8.0 at 20° C.

3. The film for packaging chemicals according to claim 1 , further comprising a plasticizer in an amount of 3 to 15 parts by mass based on 100 parts by mass of the polyvinyl alcohol.

4. The film for packaging chemicals according to claim 1 ,
wherein the polyvinyl alcohol has a degree of saponification of 90 mol % or higher.

5. The film for packaging chemicals according to claim 1 ,
wherein the amount of a constitutional unit having a hydrophilic group is 0.2 to 10 mol %.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Ieda Yasuyuki
• Yamaguchi Hidehiro

Classifications

• B65D65/42 Primary

  Applications of coated or impregnated materials · CPC title

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• B65D65/02

  Wrappers or flexible covers · CPC title

• C08J2471/02

  Polyalkylene oxides · CPC title

• B65D75/5855

  Peelable seals · CPC title