Application of the hottest environmental friendly

Application of environmental friendly adhesives in film compounding

the compounding fastness between films depends not only on the compounding process, but also on the choice of adhesives. The adhesives used for plastic composite films are mostly high molecular polymers. Since plastic composite films are mostly used for food packaging, and most of the available materials are non-polar materials, the composite adhesive should have the following performance requirements: light color, good transparency, non-toxic or low toxicity; It is easy to flow, can be soaked, and has good adhesion with printing ink; It contains a certain solid content, has fast curing speed, high bonding strength, and the bonding film should be durable and stable

the environmental friendly adhesives introduced in this paper are favored by the market in film processing, providing a good guarantee and expansion space for the environmental protection of film materials

key points of using environmental friendly adhesives in film processing

water soluble adhesives

n gw-5042 water soluble adhesives

gw-5042 can be used for the composite use of transparent films and aluminized films. It has good compatibility with solvent based and water-soluble inks and PVDC coatings, with high composite strength and good transparency

product data gw-5042 test standard

appearance tasteless uniform milky white viscous liquid

solid content% 42 ± 1 gb/t

viscosity (25 ℃) mpa S 50 GB/T

specific gravity g/ml 1.05 ± 0.2 GB/T

pH value 6.7 ± 0.3 GB/T

this model is a single component glue, which is stirred in a barrel for minutes before use to ensure that all components are mixed evenly, and is used after 100 mesh filtration. The use time is 6 hours, and the sizing amount is 1 0g/㎡, the composite membrane can be used after 4 hours of self leveling. After production, clean the equipment with water and the consolidated material with solvent

n gw-5142a/b water soluble adhesive

gw-5142a/b can be used for the composite application of transparent film and aluminized film. It has good compatibility with solvent based and water-soluble inks and PVDC coatings, with high composite strength and good transparency

product data gw-5142a gw-5142b

appearance tasteless uniform milky white viscous liquid colorless transparent viscous liquid

solid content% 42 ± 1 42 ± 1

viscosity (25 ℃) mpa S 50 50

specific gravity g/ml 1.05 ± 0.2 1.05 ± 0.2

pH value 6.7 ± 0.3 5.3 ± 0.3

this model is a two-component glue. Before use, stir it in the barrel for minutes to ensure that each component is evenly mixed, and then mix it evenly according to the proportion of a:b=20:0.5, and use it after 100 mesh filtration. The use time is 6 hours, and the sizing amount is 1 0g/㎡。 The composite membrane can be used after curing at 45 ± 5 ℃ for 12 hours. After production, the equipment is cleaned with water and the consolidated material is cleaned with solvent

n gw-5242a/b water-soluble adhesive

gw-5242a/b can be used for the composite use of transparent film and aluminized film. It has good compatibility with the dosage form and water-soluble ink in the presence of the dissolution manufacturer and PVDC coating, with high composite strength and good transparency

product data gw-5242a gw-5242b

appearance tasteless uniform milky white viscous liquid colorless transparent viscous liquid

solid content% 42 ± 150 ± 1

viscosity (25 ℃) mpa S 50 150

composite polyurethane adhesive is widely used in important fields such as packaging, printing, household appliances, building materials, transportation, new energy, safety protection, etc. the specific gravity g/ml is 1.05 ± 0.2 1.13 ± 0.2

ph 6.7 ± 0.3 7.0 ± 0.3

this model is a two-component adhesive, which is stirred in a barrel for minutes before use to ensure that all components are mixed evenly, and then mixed evenly in the proportion of a:b=20:0.5, and used after 100 mesh filtration, The use time is 6 hours, and the sizing amount is 1 0g/㎡ composite membrane can be used after curing at 45 ± 5 ℃ for 12 hours. After production, clean the equipment with water and the consolidated material with solvent

alcohol soluble two-component polyurethane adhesive

n low solid content general-purpose ag-1050a/b

ag1050a/ag1050b is a common low solid content two-component alcohol soluble polyurethane adhesive. It is suitable for the compounding of BOPP, pet, PA, CPE, CPP and other films, and can be used for light packaging of food and drugs. The composite film has good transparency and initial adhesion, good wettability to the film, and excellent coating processability

product name ag-10 preparation of carbon fiber material & nbsp; The new robot promotes the innovation of space materials 50a ag-1050b

appearance light yellow or colorless transparent light yellow or colorless transparent

solid content%50 ± 270 ± 2

viscosity (mpa.s/20 ℃) 450 ± 200 30 ± 10

ratio 8 1

material structure printing ink layer state peel strength (n/15mm)

bopp//pe and chloropropyl color ink overlay part 3.1

bopp//pe aqueous white ink full-scale part 2.0

bopp//cpp and chloropropyl color ink overlay part 2.1

bopp//cpp aqueous white ink monochrome full-scale part 1.9

n high solid content general-purpose ag-1070a/b

ag1070a/ag1070b is a common and high solid content two-component alcohol soluble polyurethane adhesive.It can be used for compounding BOPP, pet, PA, CPE, CPP and other films, and is suitable for food For the light packaging of drugs, the composite film has very good transparency and initial adhesion, has very good wettability to the film, and has excellent coating processability

product name ag-1070a ag-1070b

appearance light yellow or colorless transparent light yellow or colorless transparent

solid content%70 ± 2 70 ± 2

viscosity (mpa.s/20 ℃) 6000 ± 2500 30 ± 10

proportion 61

material structure printing ink layer state peel strength (n/15mm)

bopp//pe and chloropropyl color ink overlay 3.1

bopp//pe aqueous white ink overlay 2.0

bopp//cpp and chloropropyl color ink overlay 2.1

bopp//cpp aqueous white ink monochrome overlay 1.9

n high solid content high strength ag-6070a/b

at6070a/at6070b is a high-strength, high solid content two-component alcohol soluble polyurethane adhesive.It is suitable for compounding BOPP, pet, PA, CPE, CPP and other films, and can be used in food For the light packaging of drugs, the composite film has good transparency and higher peel strength, good wettability to the film, excellent coating processability and high initial adhesion

product name ag-6070a ag-6070b

appearance light yellow or colorless transparent light yellow or colorless transparent

solid content%70 ± 2 70 ± 2

viscosity (mpa.s/20 ℃) 11000 ± 3000 20 ± 5

proportion 61

material structure printing ink layer state peel strength (n/15mm)

bopp//pe and chloropropyl color ink overlay 3.1

bopp//pe aqueous white ink full version 2.0

bopp//cpp and chloropropyl color ink overlay 2.1

bopp//cpp aqueous white ink monochrome full version 1.9

n high solid content aluminized av-8070a/b

av8070a/av8070b is a two-component alcohol soluble type for high solid content and aluminized film composite.Polyurethane adhesive, which can effectively reduce the transfer of aluminum coating, is suitable for the composite containing VMCPP and VMPET film structure, It can be used for light packaging of food and drugs. The composite film has very good transparency and initial adhesion, has very good wetting property for the film, and has excellent coating processability

product name ag-8070a ag-8070b

appearance light yellow or colorless transparent light yellow or colorless transparent

solid content%70 ± 2 70 ± 2

viscosity (mpa.s/20 ℃) 6000 ± 2500 20 ± 5

proportion 16 1

material structure printing ink layer state peel strength (n/15mm)

bopp//pe and chloropropyl color ink overlay 3.1

bopp//pe aqueous white ink full version 2.0

bopp//cpp and chloropropyl color ink overlay 2.1

bopp//cpp aqueous white ink single color full version 1.9

ester soluble two-component polyurethane adhesive

since the mainstream market of dry compound adhesive in China is still ester soluble two-component polyurethane adhesive, the following focuses on one of them.High temperature cooking products

n ht3135a/ht3135b

ht3135a/ht3135b is a two-component ester soluble polyurethane high-temperature cooking adhesive, which has an excellent composite effect on plastic film and aluminum foil. It is especially suitable for making aluminum/plastic, plastic/plastic and other high-temperature cooking composite bags. Aluminum/plastic, plastic/plastic and other composite bags can withstand 135 ℃/30 minutes of high-temperature cooking, with resistance to contents and chemical medium erosion, high initial adhesion and high peel strength

Product Name ht3135a ht3135b ht3135p

appearance light yellow or transparent liquid light yellow or transparent liquid light yellow or transparent liquid

solid content (%) 50 ± 2% 75 ± 2% 75 ± 2%

viscosity (mpa.s/20 ℃) 2500 ± 500 2500 ± 500 5000 ± 1000

solvent ethyl acetate ethyl acetate

ratio 101 1

working life of the mixing solution

time after mixing 40 ℃ cycle

0 3hr 6hr 1 day 2 days

viscosity 24.2 27.1 33.0 37.9 53.9

remarks:

viscosity: chann 3 cup (seconds/25 ℃)

adhesive concentration: 30%

storage: glass bottle sealing

cycle: one day refers to 6 hours at 40 ℃ plus 18 hours at room temperature (20-25 ℃)

two days refers to two times of one day

viscosity curve

dilution ratio% 25% 50% 75% 100% 150% 200% 250%

nv%zc#3 cup 41.6 34.7 29.7 26 20.8 17.3 14.9

viscosity (seconds) 107.3 42.6 24.1 18.3 14.2 13.4 12.1

diagram, curing speed of ht3135a/b

heat sealing strength

time 0 3hr 8Hr 24hr 48hr 72hr

strength 4.3 6.9f 6.8f 6.8f 6.9f 7.1f

remarks:

heat sealing strength: kg/15mm, 300mm/min T-Peel is usually also known as tensile testing machine or universal tensile testing machine, with an average of 5 points

composition: ny15u/r-cpp70u

coating amount: 3.2g/㎡ dry

storage: single piece 40 ℃

heat sealing condition: 200 ℃ 1kg/c ㎡ -1 second

peeling: r-cpp breaking, F: composite membrane breaking

nco reduction rate%

time 0 3hr 8Hr 24hr 48hr 72hr

reduction rate 0 27.2 42.7 59.6 73.4 82.3

remarks:

determination: IR infrared absorption spectrometer

composition: opp20u/cpp30u

coating amount: 3.0g/㎡ (dry basis)

storage: in a 40 ℃ dryer (excluding the influence of temperature)

peel strength

composite material composition peel strength (n/15mm)

before cooking and after cooking

pet/ny/al/rcpp pet/ny non peelable non peelable

ny/al 13.5 non peelable

al/rcpp 9.6 13.9

heat sealing strength 56 50

comparison of characteristics of various adhesives

water soluble adhesives are soft and more suitable for the composite of aluminized film; High composite strength; There is no need to ripen, and it can be cut after getting off the machine; Clean production to ensure the health of operators; In plastic/plastic composite, the composite strength of water-soluble adhesive can exceed 1.0n/15mm, and it will be higher in PET composite; Compared with solvent based adhesives, water-soluble adhesives can save 20%

solvent free adhesive has high viscosity and is not easy to flow, so it needs to be heated during coating; Small molecular weight, small initial adhesion and long curing time; Strict process operation requirements; Special coating and laminating equipment is required; No organic solvent is required, and there will be no residual solvent

alcohol soluble two-component polyurethane adhesive is insensitive to humidity, which improves the stability and adaptability of the adhesive; It has good miscibility and adhesion to alcohol soluble polyurethane printing inks, and has better composite adaptability than ester soluble adhesives; It has good adaptability to the machine, and the general drying machine can be produced directly without modification; Good initial adhesion, no tunnel phenomenon, low temperature or normal temperature curing, reducing the curing cost; Free isocyanate monomer is not contained; Using industrial alcohol as solvent has low production cost, good sanitary performance and no pollution to the environment. The following figure shows the advantages, disadvantages and application scope of various adhesives

type solvent-based water-soluble solventless

processing method dry compound dry compound solventless