Plasma surface treatment of plastics to enhance adhesion

Kaplan, Stephen L.; Rose, Peter W.

doi:10.1016/0143-7496(91)90035-g

Cited by 71 publications

(39 citation statements)

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“…The measured contact angles of these samples were 110 o and 14 o respectively which agrees with the reported values [8,12]. The water contact angles of the polystyrene samples treated with argon and oxygen plasmas at different microwave power and treatment time are shown in the table (1). Similarly water contact angles of the polyethylene samples treated with the argon and oxygen at different plasma power and treatment time were determined and are shown in the table (2).…”

Section: Contact Angle Measurementssupporting

confidence: 79%

“…Surface modification of hydrophobic polymer surface into a hydrophilic or vice versa can be achieved by wet (acid, alkali), dry (plasma) and radiation treatments (ultraviolet radiation and laser) with out affecting the bulk properties [1]. Glow discharge plasmas are generally used for the surface modification of polymers because the processes involved are solvent free and dry, the consumption of chemicals is extremely low and need for sterilization of the products is eliminated.…”

Section: Introductionmentioning

confidence: 99%

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Plasma surface modification of polystyrene and polyethylene

Guruvenket

Rao

Komath

et al. 2004

Applied Surface Science

309

215

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Polystyrene (PS) and polyethylene (PE) samples were treated with argon and oxygen plasmas. Microwave Electron Cyclotron Resonance (ECR) was used to generate the argon and oxygen plasmas and these plasmas were used to modify the surface of the polymers. The samples were processed at different microwave powers and treatment time and the surface modification of the polymer was evaluated by measuring the water contact angle of the samples before and after the modification. Decrease in the contact angle was observed with the increase in the microwave power for both polystyrene and polyethylene. Plasma parameters were assessed using Langmuir probe measurements.Fourier transform infrared spectroscopy showed the evidence for the induction of oxygen based functional groups in both polyethylene and polystyrene when treated with the oxygen plasma. Argon treatment of the polymers showed improvement in the wettability which is attributed to the process called as CASING, on the other hand the oxygen plasma treatment of the polymers showed surface functionalization. Correlation between the plasma parameters and the surface modification of the polymer is also discussed * Corresponding author: gmrao@isu.iisc.ernet.in

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Section: Contact Angle Measurementssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Plasma surface modification of polystyrene and polyethylene

Guruvenket

Rao

Komath

et al. 2004

Applied Surface Science

309

215

View full text Add to dashboard Cite

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“…The focus of this paper is to investigate if plasma surface modification of the polymer surface can be used as a technique for enhancing heatseal bond strength in the absence of a lower melting point heat seal layer. The plasma treatment approach was investigated as plasmas have been widely applied to enhance the surface energy of polymers particularly prior to adhesive bonding [5,6]. The depth of modification for plasma treatment is generally less than 10 nm [7].…”

Section: Ldpe / Pet Top Film (Ldpe In Grey)mentioning

confidence: 99%

Atmospheric pressure plasma treatment of amorphous polyethylene terephthalate for enhanced heatsealing properties

Dowling

Tynan

Ward³

et al. 2012

International Journal of Adhesion and Adhesives

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An atmospheric pressure plasma system has been used to treat amorphous polyethylene terephthalate (APET) to enhance its healseal properties to a polyethylene terephthalate (PET) film. The plasma treated APET sheet material was thermoformed into trays for use in the food packaging industry and heatsealed to a PET film. The heatsealing properties of the resulting package were assessed using the burst test technique. It was found that the plasma treatment significantly enhanced the adhesive properties and an increase in burst pressure from 18 to 35 kPa was observed for plasma treated food trays. The APET surface chemistry was assessed after plasma treatment where it was found that the plasma treatment had affected an increase in oxygen and an addition of nitrogen species to the polymer surface. The surface roughness (R a ) of the plasma treated samples was also observed to increase from 0.4 to 0.9 nm after plasma treatment. IntroductionHeatsealed polymer trays are widely used for packaging food products, particularly meat and fish [1]. In the heat sealing process a polymer top film is applied to the polymer tray under elevated temperature and pressure in order to enclose the food product in an airtight environment [2]. The conventional method for creating a strong bond between a food tray and a top film is to use a co-extruded heatseal layer ( Figure 1).

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“…Adhesion strength between PE and paperboard is an important property of such packaging materials [1]. The adhesion was successfully improved by introducing polar groups such as CO and OH on the surface of PE by oxidative treatment prior to laminating with paperboard [2,3]. Limited oxidation of PE can be provided by mixing pro-oxidant additives into PE.…”

Section: Introductionmentioning

confidence: 99%

Thermal Oxidation of Polyolefins by Mild Pro-Oxidant Additives Based on Iron Carboxylates and Lipophilic Amines: Degradability in the Absence of Light and Effect on the Adhesion to Paperboard

2015

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Marine and inland pollution by non-degradable plastic bags and other plastic articles is a topic of great concern. Natural degradation processes based on oxidation of plastic pollutants could possibly contribute to limit the extent of pollution. Thermal degradation of polyolefins in the absence of light by non-polluting pro-oxidants has not been presented before. In this study, we show that two amines, stearyl amine and [(3-(11-aminoundecanoyl) amino) propane-1-] silsesquioxane (amino-POSS) in combination with ferric stearate (FeSt 3 ) tremendously accelerate the thermal oxidation of polyolefins compared with reference samples. Both amines and FeSt 3 are to a large extent based on renewable resources. Polyethylene and polypropylene samples containing less than 100 ppm of iron and 1% of amine were extremely brittle after 10 days in a circulation oven in the absence of light. No significant degradation could be seen with samples containing iron but no amine. In a different application, the initial oxidation of polyethylene can be used in order to increase its adhesion to cardboard. Excellent adhesion between polyethylene and cardboard is important for liquid packaging based on renewable resources. Amino-POSS has been chosen for food packaging applications due to its expected lower leakage from polyethylene (PE) compared with stearyl amine. Film samples of PE/amino-POSS/FeSt 3 blends were partly oxidized in a circulation oven. The oxidation was documented by Polymers 2015, 7 1523 increased carbonyl index (CI) and melt flow index (MFI). The limited extent of oxidation has been proved by unchanged tensile strength and only moderate changes in elongation at break when compared to reference polyethylene films containing no FeSt 3 or amino-POSS. The PE/amino-POSS/FeSt 3 blends were compression moulded to paperboard. The adhesion of non-aged blends to paperboard decreased with increasing amino-POSS content which is in good compliance with an earlier reported lubricant effect of high amounts of POSS in PE. Thermal ageing of PE/amino-POSS/FeSt 3 films prior to coating however led to a significant increase in adhesion. Improved physical interlocking due to increased MFI and interaction between C=O of the blends and OH of paperboard can explain the adhesion improvement. The films were not brittle after thermal ageing, which makes their use in industrial packaging feasible. A mechanism explaining the role of amines during thermal oxidation of polyolefins in the presence of iron is proposed.

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Plasma surface treatment of plastics to enhance adhesion

Cited by 71 publications

References 1 publication

Plasma surface modification of polystyrene and polyethylene

Plasma surface modification of polystyrene and polyethylene

Atmospheric pressure plasma treatment of amorphous polyethylene terephthalate for enhanced heatsealing properties

Thermal Oxidation of Polyolefins by Mild Pro-Oxidant Additives Based on Iron Carboxylates and Lipophilic Amines: Degradability in the Absence of Light and Effect on the Adhesion to Paperboard

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