• Title/Summary/Keyword: pressure sensitive adhesive

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Effect of Acrylic Acid Contents and Inorganic Fillers on Physical Properties of Acrylic Pressure Sensitive Adhesive Tape by UV Curing (아크릴산 함량 및 무기물 충전제가 UV 경화형 아크릴 점착테이프의 물성에 미치는 영향)

  • Kim, Dong-Bok
    • Polymer(Korea)
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    • v.37 no.2
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    • pp.184-195
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    • 2013
  • Acrylic pressure sensitive adhesive (PSA) tapes were used for the automotive, the electrical and the electronic industries and the display module junction. In this study, the manufacture of high-strength structural tape used 2-ethylhexyl acrylate (2-EHA) and acrylic acid (AAC), and UV irradiation for photo-polymerization, and the semi-structural properties of acrylic PSA tape with the AAC content and inorganic filler $SiO_2$ content were investigated. The initial adhesion strength was lowered by the rigidity of molecule chains due to the use of AAC, and the adhesion strength increased with increasing wetting time. The wetability, contact angle, and SEM images of PSA tapes with various contents of AAC were determined. Without filler, the peel strength and dynamic shear strength of PSA tape showed inverse correlation but the peel strength and dynamic shear strength increased with increasing filler content. From these correlations the PSA tapes could be optimized for the applications requiring high performance.

Preparation of Aminosiloxane-grafted Poly(imidesiloxane) Copolymer and its Morphology and Adhesive Properties in Film (아미노실록산이 그래프팅된 폴리(이미드실록산) 공중합체 제조와 필름 모폴로지 및 점착 특성 연구)

  • Lee, Ji Mok;Kwon, Eunjin;Lee, Sunyoung;Jung, Hyun Min
    • Polymer(Korea)
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    • v.37 no.4
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    • pp.547-552
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    • 2013
  • Polyimide (PI) containing carboxyl functional group was prepared and reacted with diaminosiloxane during high temperature film casting. The morphology of resulting film was observed by using transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX), which revealed that globular 100 nm-sized PI domains and continuous polysiloxane phase were formed. X-ray photoelectron spectroscopy (XPS) study indicated that air-film interface mainly consisted of polysiloxane blocks. Poly(imidesiloxane) thin layer was thermostable until $400^{\circ}C$ and its pressure- sensitive adhesive property was retained up to $300^{\circ}C$. The comparative experiments revealed that grafting between carboxyl groups of polyimide and aminosiloxane was crucial for formation of microdomain structure and pressure-sensitive adhesive property.

Adhesive Property Changes Associated with the Content of Acrylic Acid Monomer and Aziridine Crosslinking Agent (아크릴산 단량체와 아지리딘 경화제 함량에 따른 점착제의 점착물성 변화)

  • Choi, Hwan-Seok;Hwang, Hyo-Yeon;Jeoung, Sun-Kyoung;Lee, Seung-Goo;Lee, Kee-Yoon
    • Polymer(Korea)
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    • v.36 no.1
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    • pp.29-33
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    • 2012
  • Solution type pressure sensitive acrylic adhesives were synthesized from 2-ethylhexyl acrylate (2-EHA) as a base monomer and acrylic acid as a functional monomer. The surface energy and basic physical properties of synthesized PSA (pressure sensitive adhesives) were investigated as a function of contents of acrylic acid and crosslinking agent. The structures of adhesive were identified by FTIR. Viscosities and molecular weights of PSA were measured by a Brookfield viscometer and GPC, respectively. Consequently, molecular weight and viscosity increased as the contents of acrylic acid increased up to 6 wt% and then decreased at higher contents. Surface energy increased as the contents of acrylic acid increased owing to the increase of COOH groups, which yielded the enhancement of polarity of PSA. On the other hands, their peel strengths were inversely proportional to molecular weight and showed tendencies of decreasing as the contents of acrylic acid and crosslinking agent increased.

Design and Properties of Laminating Waterborne PSA for Eco-friendly Flexible Food Packaging (식품연포장용 라미네이트 수성 감압점착제의 친환경적 적용에 대한 연구)

  • Lee, Jin-Kyoung;Shim, Myoung-Sik;Chin, In-Joo
    • Journal of Adhesion and Interface
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    • v.17 no.2
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    • pp.49-55
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    • 2016
  • In this study, we designed an environment friendly, water-based adhesive using the acrylic emulsion method as a replacement for solvent-based adhesives, which are most commonly used in layered laminates for flexible food packaging. We designed adhesives with different combinations of anionic, non-ionic, and phosphoric ester surfactants, and with different concentrations of chain transfer agent (CTA). We also examined the effect of the degree of cross-linking by synthesizing and comparing 8 test group adhesives with different types of functional monomers. Additionally, we synthesized 2 other test group pressure-sensitive adhesives (PSA) using styrene/alpha-methyl styrene/acrylic acid (SAA) semipolymer dispersing agents (with molecular weights of 13,000 g/mol and 8,600 g/mol, respectively) to replace the conventional surfactants. We evaluated whether the 10 test group pressure-sensitive adhesives met the basic physical property criteria required for flexible food packaging by carrying out a physical analysis of their glass transition temperature (Tg), particle size, adhesion, and molecular weight. In our test, 2 test group adhesives manufactured with the combination of anionic and non-ionic surfactants, CTA concentration of 0.2%, and functional monomers of hydroxyethyl acrylate (HEA) and glycidyl methacrylate (GMA) demonstrated molecular weight and flexibility suitable for flexible packaging, with low adhesiveness and small particle size.

Adhesive Properties of Emulsion PSA Polymerized Using Tween Series Nonionic Surfactants (Tween계 비이온 계면활성제를 이용하여 중합한 에멀션점착제의 접착물성)

  • Lim, Tae Kyun;Lee, Myung Cheon
    • Korean Chemical Engineering Research
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    • v.52 no.3
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    • pp.289-293
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    • 2014
  • In making emulsion type pressure sensitive adhesive (PSA), environmentally friendly Tween series nonionic surfactants were used to find out the possibility of substituting the traditional nonyl-phenyl nonionic surfactant (NP-40) by comparing their adhesive properties. Results exhibited that the PSA used Tween series nonionic surfactants showed much better adhesive properties in peel strength and holding power than that used NP-40.

Failure Analysis of PSA applied electronics in home appliances (전자제품 적용 감압성 점착제(PSA)의 고장분석)

  • Kim, So-Yeon;In, Tae-Kyung;Kim, Jin-Woo;Kim, Myung-Su
    • Journal of Applied Reliability
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    • v.9 no.4
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    • pp.331-341
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    • 2009
  • PSA (Pressure Sensitive Adhesive) is used for various purposes in electronic appliances such as double-sided tape for fitting parts, product's name plate, and surface protecting film, and so forth. In several kinds of PSAs, this paper dealt with the failure analysis of PET (Polyethylene Terephthalate) acrylic adhesive tapes. The causes of interface failure were investigated through the test of adhesive strength, thickness, and structure. And test standard methods to prevent recurrences were established.

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Preparation and Characterization of Removal-type Acrylic Pressure-Sensitive Adhesive (4원 아크릴계 박리형 점착제의 제조와 특성에 관한 연구)

  • Seo, Young-Ok;Seul, Soo-Duk
    • Elastomers and Composites
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    • v.36 no.4
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    • pp.225-236
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    • 2001
  • In order to improve the properties of the copolymer and the terpolymer that was used as removal-type pressure sensitive adhesive(PSA), we synthesized quaterpolymer with the variation of the types of monomer, initiator, and solvent, and concentration, the monomer/solvent ratio, reaction temperature and time. and determined the properties of this adhesive: the viscosity, molecular weight, conversion, solid content and structure of polymer. The prepared polymer was crosslinked by changing the type of crosslinking agent and concentration, and then we investigated the characteristics or adhesive such as peel adhesion, shear adhesion, heat resistance, weathering resistance and peel adhesion to aging. The optimum performance of RA/2- EHA/MMA/2-HEMA as a PSA were obtained when benzoyl peroxide was used as an initiator with the reactant mixture consisted of 80% BA and 2-EHA, 15%, MMA, and 5% 2-HFMA. The optimum reaction temperature and time were $80^{\circ}C$ and 8 hours, respectively. For BA/2-EHA/MMA/AA, the optimum performance was obtained when the polymerization was performed at the monomer composition of 80% BA/2-EHA, 15% MMA, and 5% AA. BPO was used as initiator and the optimum reaction temperature and time were identical to those of BA/2-EHA/MMA/ 2-HEMA. Isocyanate and melamine were used to crosslink BA/2-EHA/MMA/2-HEMA and BA/2-EHA/MMA/AA, respectively. No effect on the type of cross-linking agent on the peel adhesion was observed with aging. The quarterpolymers crosslinked with melamine left residues on the counter surface after weathering resistance test, while the polymers crosslinked with isocyanate did not.

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Synthesis of Acrylic Pressure-Sensitive Adhesive by Emulsion Polymerization (유화중합에 의한 수성 아크릴계 접착제의 합성)

  • Kim, Dong-yeub
    • Journal of the Korean Society of Industry Convergence
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    • v.9 no.1
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    • pp.45-50
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    • 2006
  • In order to analyse the properties of the fiber-adhesive that was used as Flocking process we synthesized quaterpolymer with the variation of the types of monomer ratio by emulsion polymerization. We characterized the properties of this adhesive: Differential Scanning Calorimeter(DSC), Thermogravimetry Analysis(TGA), Raman spectroscopy. The polymer was synthesized by changing the using amount of 2-EHAM, and then we investigated the characteristics of glass transition temperature(Tg), melting temperature(Tm), thermal stability and hydroxyl group respectively. The optimum monomer composition was 36.84% EAM, 15.79% MAM, 42.1% 2-EHAM and 5.26% AAc.

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Effects of Intra-particle Composition on the Adhesive Properties and Water Dispersity of Water Dispersible Acrylic Emulsion Pressure Sensitive Adhesive (입자 내 조성 변화가 수분산성 아크릴 에멀젼 점착제의 점착 물성과 수분산성에 미치는 영향)

  • Seo, In Seon;Lee, Myung Cheon
    • Applied Chemistry for Engineering
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    • v.18 no.5
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    • pp.444-448
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    • 2007
  • The effects of intra-particle composition on the adhesive properties and water dispersity of acrylic emulsion type pressure sensitive adhesives (PSAs) were investigated. In the case of PSA having uniform intra-particle composition, the higher holding strength made the water dispersity lower. By changing the intra-particle composition in hard core/soft shell type, however, it was possible to get PSAs showing both high holding strength and water dispersity. When the weight ratio of MAA/AA is 4/1, high holding strength, but low initial tack and very low water dispersity were observed in both cases of higher contents of (AA+MAA) in core and shell area. When the weight ratio of MAA/AA is 1/4, however, higher water dispersity and lower holding strength were indicated in the case of higher contents of (AA+MAA) in shell area.