Chemical product packaging film

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.

Claims

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 %.

Description

DESCRIPTION OF EMBODIMENTS

(1) In the following, the present invention will be described in more detail based on, but not limited to, examples.

EXAMPLE 1

(2) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 86.5 parts by mass of a pyrrolidone ring-modified polyvinyl alcohol (degree of polymerization: 1000, degree of saponification: 95.8 mol %, amount of groups modified with a pyrrolidone ring group: 4 mol %, viscosity of a 4% by mass aqueous solution: 10 mPa.Math.s) having a constitutional unit represented by the formula (1), as polyvinyl alcohol; 5.0 parts by mass of glycerin (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 92) and 7.0 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134) as plasticizers; and 1.5 parts by mass of polyoxyethylene octylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon NK-810, HLB: 13.6, the number of moles of oxyethylene groups: 10 mol) as a surfactant.

(3) The resulting PVA aqueous solution was applied to a polyethylene terephthalate (PET) film (thickness: 50 m), which was a supporting member, by a lip coater, and dried at 70 C. for 10 minutes, and subsequently at 110 C. for 10 minutes. The resulting laminate composed of the supporting member and the film (thickness: 50 m) for packaging chemicals applied to the member was wound up around a paper core with an inner diameter of 3 inches to give a roll.

EXAMPLE 2

(4) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 94.2 parts by mass of an unmodified polyvinyl alcohol as polyvinyl alcohol (degree of polymerization: 1300, degree of saponification: 88.0 mol %, viscosity of a 4% by mass aqueous solution: 14 mPa.Math.s); 3.3 parts by mass of glycerin (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 92), 0.8 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134), and 0.8 parts by mass of polyethylene glycol 600 (produced by Wako Pure Chemical Industries, Ltd., average molecular weight: 600) as plasticizers; and 0.9 parts by mass of polyoxyethylene dodecylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon DP-9, HLB: 12, the number of moles of oxyethylene groups: 9 mol) as a surfactant.

(5) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

EXAMPLE 3

(6) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 90.0 parts by mass of a sodium sulfonate-modified polyvinyl alcohol (degree of polymerization: 1200, degree of saponification: 95.4 mol %, amount of groups modified with a sulfonic acid group: 4 mol %, viscosity of a 4% by mass aqueous solution: 12.1 mPa.Math.s), as polyvinyl alcohol, having a constitutional unit represented by the formula (2) in which R.sup.1 is a 2-methylene propylene group; 2.7 parts by mass of glycerin (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 92) and 2.7 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134) as plasticizers; and 4.6 parts by mass of polyoxyethylene octylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon NK-810, HLB: 13.6, the number of moles of oxyethylene groups: 10 mol) as a surfactant.

(7) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

EXAMPLE 4

(8) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 91.0 parts by mass of a sodium sulfonate-modified polyvinyl alcohol (degree of polymerization: 1200, degree of saponification: 95.4 mol %, amount of groups modified with a sulfonic acid group: 4 mol %, viscosity of a 4% by mass aqueous solution: 12.1 mPa.Math.s), as polyvinyl alcohol, having a constitutional unit represented by the formula (2) in which R.sup.1 is a 2-methylene propylene group; 4.0 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134) and 2.0 parts by mass of polyethylene glycol 600 (produced by Wako Pure Chemical Industries, Ltd., average molecular weight: 600) as plasticizers; and 3.0 parts by mass of polyoxyethylene nonylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon N-510, HLB: 13.3, the number of moles of oxyethylene groups: 10 mol) as a surfactant.

(9) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

EXAMPLE 5

(10) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 90.0 parts by mass of a sodium sulfonate-modified polyvinyl alcohol (degree of polymerization: 1200, degree of saponification: 95.4 mol %, amount of groups modified with a sulfonic acid group: 4 mol %, viscosity of a 4% by mass aqueous solution: 12.1 mPa.Math.s), as polyvinyl alcohol, having a constitutional unit represented by the formula (2) in which R.sup.1 is a 2-methylene propylene group; 4.0 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134) and 2.0 parts by mass of polyethylene glycol 600 (produced by Wako Pure Chemical Industries, Ltd., average molecular weight: 600) as plasticizers; 3.0 parts by mass of citric acid (produced by Wako Pure Chemical Industries, Ltd.) as an acid material; and 1.0 part by mass of polyoxyethylene octylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon NK-810, HLB: 13.6, the number of moles of oxyethylene groups: 10 mol) as a surfactant.

(11) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

EXAMPLE 6

(12) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 91.0 parts by mass of a pyrrolidone ring-modified polyvinyl alcohol (degree of polymerization: 1000, degree of saponification: 95.8 mol %, amount of groups modified with a pyrrolidone ring group: 4 mol %, viscosity of a 4% by mass aqueous solution: 10 mPa.Math.s), as polyvinyl alcohol, having a constitutional unit represented by the formula (1); 4.0 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134) as a plasticizer; 3.8 parts by mass of citric acid (produced by Wako Pure Chemical Industries, Ltd.) as an acid material; and 1.2 parts by mass of polyoxyethylene octylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon NK-810, HLB: 13.6, the number of moles of oxyethylene groups: 10 mol) as a surfactant.

(13) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

EXAMPLE 7

(14) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene dodecylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon DP-12, HLB: 13.6, the number of moles of oxyethylene groups: 12 mol) was used as a surfactant.

EXAMPLE 8

(15) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene dodecylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon DP-5.3, HLB: 9.4, the number of moles of oxyethylene groups: 5.3 mol) was used as a surfactant.

EXAMPLE 9

(16) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene phenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon PH-5, HLB: 14.0, the number of moles of oxyethylene groups: 5 mol) was used as a surfactant.

COMPARATIVE EXAMPLE 1

(17) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 90.2 parts by mass of a sodium sulfonate-modified polyvinyl alcohol (degree of polymerization: 1200, degree of saponification: 95.4 mol %, amount of groups modified with a sulfonic acid group: 4 mol %, viscosity of a 4% by mass aqueous solution: 12.1 mPa.Math.s), as polyvinyl alcohol, having a constitutional unit represented by the formula (2) in which R.sup.1 is a 2-methylene propylene group; 4.0 parts by mass of glycerin (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 92), 3.0 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134), and 2.0 parts by mass of polyethylene glycol 600 (produced by Wako Pure Chemical Industries, Ltd., average molecular weight: 600) as plasticizers; and 0.8 parts by mass of polyoxyethylene dodecylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon DP-9, HLB: 12, the number of moles of oxyethylene groups: 9 mol) as a surfactant.

(18) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was obtained as in Example 1, except that the resulting PVA aqueous solution was used.

COMPARATIVE EXAMPLE 2

(19) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 85.8 parts by mass of a sodium sulfonate-modified polyvinyl alcohol (degree of polymerization: 1200, degree of saponification: 95.4 mol %, amount of groups modified with a sulfonic acid group: 4 mol %, viscosity of a 4% by mass aqueous solution: 12.1 mPa.Math.s), as polyvinyl alcohol, having a constitutional unit represented by the formula (2) in which R.sup.1 is a 2-methylene propylene group; 4.0 parts by mass of glycerin (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 92), 3.0 parts by mass of trimethylolpropane (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 134), and 2.0 parts by mass of polyethylene glycol 600 (produced by Wako Pure Chemical Industries, Ltd., average molecular weight: 600) as plasticizers; and 5.2 parts by mass of polyoxyethylene dodecylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon DP-9, HLB: 12, the number of moles of oxyethylene groups: 9 mol) as a surfactant.

(20) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

COMPARATIVE EXAMPLE 3

(21) A 15% by mass aqueous solution of polyvinyl alcohol was prepared by dissolving in water 96.4 parts by mass of an unmodified polyvinyl alcohol (degree of polymerization: 1300, degree of saponification: 88.0 mol %, viscosity of a 4% by mass aqueous solution: 14 mPa.Math.s) as polyvinyl alcohol; 3.3 parts by mass of glycerin (produced by Wako Pure Chemical Industries, Ltd., molecular weight: 92) as a plasticizer; and 0.3 parts by mass of lauric acid diethanolamide (produced by Wako Pure Chemical Industries, Ltd., HLB: 5.8, the number of moles of oxyethylene groups: 0 mol) as a surfactant.

(22) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 1, except that the resulting PVA aqueous solution was used.

COMPARATIVE EXAMPLE 4

(23) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene nonylphenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon N-504, HLB: 8.9, the number of moles of oxyethylene groups: 4 mol) was used as a surfactant.

COMPARATIVE EXAMPLE 5

(24) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene styrenated phenyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon KTSP-16, HLB: 12.7, the number of moles of oxyethylene groups: 16 mol) was used as a surfactant.

COMPARATIVE EXAMPLE 6

(25) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene benzyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon BA-2, HLB: 9.0, the number of moles of oxyethylene groups: 2 mol) was used as a surfactant.

COMPARATIVE EXAMPLE 7

(26) A roll of a laminate composed of a supporting member and a film (thickness: 50 m) for packaging chemicals layered on the member was prepared as in Example 4, except that polyoxyethylene -naphthyl ether (produced by AOKI OIL INDUSTRIAL CO., LTD., blaunon BN-10, HLB: 15.0, the number of moles of oxyethylene groups: 10 mol) was used as a surfactant.

(27) (Evaluation)

(28) The films for packaging chemicals obtained in the examples and the comparative examples were evaluated as follows. Table 2 shows the results.

(29) (1) Measurement of pH of Aqueous Solution of Film for Packaging Chemicals

(30) 7 g of the resulting film for packaging chemicals was put into 93 g of deionized water at room temperature, and completely dissolved thereto by heating the water to approximately 90 C. under stirring. The resulting aqueous solution was cooled to 20 C., and the pH of the aqueous solution was measured using a pH meter (produced by METTLER TOLEDO, MP230).

(31) (2) Measurement of Yellowness Index (YI)

(32) The initial YI value of the resulting film for packaging chemicals was measured using a color and color difference meter (produced by NIPPON DENSHOKU INDUSTRIES CO., LTD., Model ZE2000).

(33) The resulting film for packaging chemicals was allowed to stand in an environment at 80 C. for 3 days, and further allowed to stand at 23 C.50% RH for 24 hours. The YI value over time of the film for packaging chemicals was then measured. The yellowness index (YI) was represented by the following equation, and evaluated in accordance with the following criteria.
Yellowness index (YI)=YI value over timeinitial YI value
Good (): YI of lower than 0.8
Bad (): YI of 0.8 or higher
(3) Evaluation of Scratches

(34) The resulting film for packaging chemicals was unwound up to 50 meters in length from a 50 mm-width roll in accordance with JIS Z 0237 at an unwound rate of 20 m/min. Presence of scratches on the surface of the film for packaging chemicals was observed using a laser microscope (produced by KEYENCE CORPORATION, VK-8710), and evaluated in accordance with the following criteria.

(35) Good (): No scratch was observed.

(36) Bad (): Scratches were observed.

(37) (4) Roll Contamination

(38) The resulting film for packaging chemicals was unwound up to 50 meters in length from a 50 mm-width roll in accordance with JIS Z 0237 at an unwound rate of 20 m/min. Contamination of a metal roll was visually observed and evaluated in accordance with the following criteria. In Comparative Example 2, the film for packaging chemicals adhered to the metal roll due to bleeding of a surfactant on the surface of the film for packaging chemicals, and thus could not be evaluated.

(39) Excellent (): No contamination of the roll was observed.

(40) Good (): Contamination of the roll was slightly observed.

(41) Bad (): Contamination causing gleaming of the roll was observed, or could not be evaluated.

(42) (5) Leakage of Chemicals

(43) A bag (10 cm15 cm) was prepared using the resulting film for packaging chemicals. 35 g of calcium hypochlorite was placed in the bag, and the bag was heat sealed. Thus, a packaged body containing chemicals thereinside was obtained. The resulting packaged body was sealed in an aluminum bag, and allowed to stand in an environment at 80 C. for 3 days. After that, the resulting packaged body was allowed to stand in an environment at 23 C.50% RH for 24 hours, and only the film for packaging chemicals was subjected to an odor sensory test to evaluate leakage of chemicals, and evaluated in accordance with the following criteria.

(44) Good (): No odor was sensed.

(45) Fair (): Odor was slightly sensed.

(46) Bad (): Intense odor was sensed.

(47) (6) Chemical Resistance

(48) The resulting film for packaging chemicals was folded in half, and edge portions were heat sealed to prepare a bag with a size of 5 cm4 cm with one open edge. 25 g of trichloroisocyanuric acid powder was placed in the bag. The open edge of the bag was heat sealed to prepare a packaged body containing trichloroisocyanuric acid powder thereinside. The resulting packaged body was allowed to stand in an environment at 40 C.90% RH for 24 hours to allow the film to absorb moisture. The packaged body was placed and sealed in a PTFE inner cylindrical sealing container (produced by SANSYO Co., LTD., including a metal valve for SR-50) so as not to disperse water or a plasticizer from the bag. After such a resulting sample was allowed to stand in an oven at a temperature of 70 C. for 1 week, the packaged body was opened to remove contents. Thus, a film for chemical resistance evaluation was prepared, and evaluated for water solubility and visibility after a chemical resistance test.

(49) (6-1) Water Solubility after Chemical Resistance Test

(50) A sample with a size of 30 mm30 mm was cut from the obtained film for evaluation, and the weight of the sample was measured. The sample was fixed with a jig, and water (500 ml) was poured into a 500 ml-beaker. The sample fixed with a jig was immersed in water in the beaker kept at 23 C. while stirring with a stirrer (with keeping a vortex such that the lowest portion of the vortex reaches to the 400 ml mark). The sample was allowed to stand for 60 minutes, and an obtained aqueous solution was allowed to pass through a mesh filter with an aperture of 300 m, whose weight was preliminary measured, to separate undissolved gel components. The mesh filter was dried at 80 C. for 3 hours to measure the weight change of the mesh filter. Then, the solubility was calculated from the weight change, and the solubility after a chemical resistance test was evaluated in accordance with the following criteria. The solubilities of the films for packaging chemicals obtained in examples and comparative examples were all 100%.

(51) Good (): Solubility of 90% or higher

(52) Bad (): Solubility of lower than 90%

(53) (6-2) Visibility after Chemical Resistance Test

(54) The YI value over time of the obtained sample for evaluation was measured in the same manner as in (2) Measurement of yellowness index (YI) using a color and color difference meter (produced by NIPPON DENSHOKU INDUSTRIES CO., LTD., Model ZE2000). Thus, a yellowness index (YI) was evaluated in accordance with the following criteria.

(55) Good (): YI of lower than 5

(56) Bad (): YI of 5 or higher

(57) (7) Detachability

(58) The resulting film for packaging chemicals was allowed to stand in an environment at 23 C.50% RH for 24 hours. The film was then cut into a size of 15 mm15 cm and applied to a heat seal plate (made of SUS304, thickness: 0.05 mm, 15 mm10 cm). The film was hot pressed for 1 second with a heat sealer (produced by TESTER SANGYO CO., LTD., TP-701S) at 150 C. and a pressure of 2.8 kgf/cm.sup.2.

(59) After the hot pressing, the film for packaging chemicals was allowed to stand in an environment at 23 C.50% RH for 24 hours, and then subjected to a 180 peel test at a peeling rate of 200 mm/min to measure the peel strength from the SUS plate. The detachability from the SUS plate was evaluated in accordance with the following criteria.

(60) Excellent (): less than 0.05 N/15 mm

(61) Good (): 0.05 N/15 mm or more but less than 0.15 N/15 mm

(62) Bad (): 0.15 N/15 mm or more

(63) (8) Melting Point Measurement

(64) The melting point of the film for packaging chemicals was measured with a differential scanning calorimeter (produced by Seiko Instruments Inc., EXSTAR-6000) at a rate of temperature rise of 10 C./min.

(65) TABLE-US-00001 TABLE 1 Composition of aqueous solution of polyvinyl alcohol Plasticizer Acid Surfactant Polyvinyl alcohol (PVA) (part by mass) material (part by mass) Degree of Amount of Viscosity of Addition Polyeth- (part by Polyoxy- Degree of saponi- modifying 4% by aqueous amount ylene mass) ethylene polymer- fication Modifying group solution (part by Trimethylol glycol Citric octylphenyl ization (mol %) group (mol %) (mPa-s) mass) Glycerin propane 600 acid ether Ex. 1 1000 95.8 Pyrrolidone 4 10 86.5 5.0 7.0 1.5 ring group Ex. 2 1300 88.0 14 94.2 3.3 0.8 0.8 Ex. 3 1200 95.4 Sulfonic 4 12.1 90.0 2.7 2.7 4.6 acid group Ex. 4 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 acid group Ex. 5 1200 95.4 Sulfonic 4 12.1 90.0 4.0 2.0 3.0 1.0 acid group Ex. 6 1000 95.8 Pyrrolidone 4 10 91.0 4.0 3.8 1.2 ring group Ex. 7 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 acid group Ex. 8 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 acid group Ex. 9 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 acid group Comp. 1200 95.4 Sulfonic 4 12.1 90.2 4.0 3.0 2.0 Ex. 1 acid group Comp. 1200 95.4 Sulfonic 4 12.1 85.8 4.0 3.0 2.0 Ex. 2 acid group Comp. 1300 88.0 14 96.4 3.3 Ex. 3 Comp. 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 Ex. 4 acid group Comp. 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 Ex. 5 acid group Comp. 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 Ex. 8 acid group Comp. 1200 95.4 Sulfonic 4 12.1 91.0 4.0 2.0 Ex. 7 acid group Composition of aqueous solution of polyvinyl alcohol Surfactant (part by mass) Amount based Number on 100% of by mass moles of film Polyoxy- Polyoxy- Lauric Polyoxy- Polyoxy- Polyoxy- Polyoxy- of for ethylene ethylene acid ethylene ethylene ethylene ethylene ethylene packaging dodocylphenyl nonylphenyl diethanol phenyl styrenated benzyl -naphthyl groups chemicals ether ether amide ether phenyl ether ether ether HLB (mol) (% by mass) Ex. 1 13.6 10 1.5 Ex. 2 0.9 12 9 0.9 Ex. 3 13.6 10 4.6 Ex. 4 3.0 13.3 10 3.0 Ex. 5 13.6 10 1.0 Ex. 6 13.6 10 1.2 Ex. 7 3.0 13.6 12 3.0 Ex. 8 3.0 9.4 5.3 3.0 Ex. 9 3.0 14 5 3.0 Comp. 0.8 12 9 0.8 Ex. 1 Comp. 5.2 12 9 5.2 Ex. 2 Comp. 0.3 5.8 0 0.3 Ex. 3 Comp. 3.0 8.9 4 3.0 Ex. 4 Comp. 3.0 12.7 16 3.0 Ex. 5 Comp. 3.0 9.0 2 3.0 Ex. 8 Comp. 3.0 15.0 10 3.0 Ex. 7

(66) TABLE-US-00002 TABLE 2 Evaluation Chemical resistance Yellowness index Water solubility after YI Leakage chemical resistance test Initial over Evaluation of of Solubility pH YI time YI Evaluation scratches Contamination chemicals (%) Ex. 1 6.9 0.7 1.1 0.4 93.6 Ex. 2 6.8 0.9 1.5 0.6 92.1 Ex. 3 5.9 3.4 3.9 0.5 98.4 Ex. 4 6.2 3.1 3.7 0.6 95.0 Ex. 5 4.8 2.1 2.5 0.4 93.3 Ex. 6 3.6 0.9 1.2 0.3 94.5 Ex. 7 6.1 3.2 3.9 0.7 95.0 Ex. 8 6.4 3.0 3.7 0.7 94.3 Ex. 9 6.2 2.9 3.5 0.6 93.8 Comp. 6.0 3.2 3.8 0.6 x x 84.6 Ex. 1 Comp. 6.1 2.9 3.6 0.7 x x 95.3 Ex. 2 Comp. 8.3 1.0 3.3 2.3 x 62.3 Ex. 3 Comp. 6.2 3.1 3.8 0.7 x 94.8 Ex. 4 Comp. 6.5 3.5 4.2 0.7 x 92.5 Ex. 5 Comp. 6.3 3.2 3.9 0.7 x 92.2 Ex. 6 Comp. 6.3 3.2 3.9 0.7 x 90.2 Ex. 7 Evaluation Chemical resistance Visibility after Detatchability chamical resistance test To SUS Water solubility after YI Peeling Melting chemical resistance test Initial over strength point Evaluation YI time YI Evaluation (N/15 mm) Evaluation ( C.) Ex. 1 0.7 3.1 2.4 0.03 122 Ex. 2 0.9 5.1 4.2 0.12 139 Ex. 3 3.4 6.7 3.3 0.01 127 Ex. 4 3.1 6.3 3.2 0.01 133 Ex. 5 2.1 6.5 4.4 0.1 138 Ex. 6 0.9 3.2 2.3 0.06 130 Ex. 7 3.7 7.5 3.8 0.03 135 Ex. 8 3.1 6.6 3.5 0.08 132 Ex. 9 3.0 6.6 3.6 0.06 132 Comp. x 3.2 7.2 4.0 0.15 x 128 Ex. 1 Comp. 2.9 6.7 3.8 0.01 115 Ex. 2 Comp. x 1.0 10.3 9.3 x 0.21 x 143 Ex. 3 Comp. 3.2 6.5 3.3 0.13 131 Ex. 4 Comp. 3.5 9.8 6.3 x 0.18 x 135 Ex. 5 Comp. 3.2 6.6 3.4 0.16 x 134 Ex. 6 Comp. 3.2 10.1 6.9 x 0.15 x 131 Ex. 7

INDUSTRIAL APPLICABILITY

(67) The present invention can provide 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 has excellent chemical resistance. The present invention can also provide a film for packaging chemicals which is easily detachable from a heat seal plate when contents are packed and sealed therein.