Pressure sensitive tape rubber

Specialty pressure-sensitive tapes rubber base (Drew-Minnesota Mining Mfg. Co.)... 

Laminated tapes In more general use now than pressure sensitive tapes are tapes consisting of polyvinyl chloride or polyethylene films in conjunction with butyl rubber. These tapes are applied with an adhesive butyl rubber primer. Thicknesses of up to 0-75 mm are in use and loose protective outer wraps of p.v.c. or polyethylene sheet are commonly applied. Tape quality control is exercised with reference to ASTM standard test methods and may include water vapour transmission rate and elongation. 

Lee (41, 42) offers a valuable contribution on the mechanism of reinforcement and especially on the role of adhesion and wetting in elastomeric adhesives, pressure-sensitive tapes, nonpigmented organic coatings, and composites such as resin-reinforced rubbers or thermoplastics. I am sure it will generate much discussion. Lee (43) presents a... 

Use Paints, rubber plasticizers, curing concrete, impregnating paper, adhesives, hot-melt coatings, pressure-sensitive tapes. 

Early adhesive uses of butyl rubber generally consisted of solvent-based dispersions, or tape and rope extrusion of formulated solid rubber. Extensive use was made of butyl rubber s inherent tackiness in highly saturated grades of the polymer to make pressure sensitive tapes and precoated films. The polymers are also extensively used as major components of hot-melt adhesives, solid rubber sealing tapes, and caulking grades of sealants and mastics, of which most were high solids content solvent-based formulations. 

The most recent development in pressure-sensitive tape manufacture is the development of the hot-melt coating process. Almost aU of the current hot-melt applied adhesives (see also Hot-melt adhesives) are based on SIS thermoplastic rubber, mixed with hydrocarbon tackifier resins and oils in substantial amounts, and an antioxidant in minor amounts. 

Rubber-based adhesives, also called elastomeric adhesives, is probably the most commonly known family of adhesives for industrial and household applications such as pressure-sensitive tapes and labels, construction, contact adhesives, hot melt packaging and bookbinding, and high-strength structural applications for aircraft, automotive and construction. In fact, about one-third of the adhesives used in the world are made from natural or synthetic rubbers. This article gives a general introduction. More specific aspects can be found in further articles listed at the end. 

Medical tapes are the oldest application of pressure-sensitive tapes [203]. Major progress towards skin compatibility was made by introduction of zinc oxide into the rubber-based PSAs [282]. With the development of polyisoprene, polyisobutylene, and other synthetic elastomers, natural rubber was replaced to a certain extent in medical products by synthetic rubbers. These were followed by the styrenic block copolymers [211, pp. 317-373]. 

Terpene Resins are low molecular weight hydrocarbon resins prepared by cationic polymerization of certain terpenes. They are used as tackifiers in pressure-sensitive tapes, masking tapes, hot melt coatings and adhesives, laminating adhesives and rubber solution adhesives. Terpene resins can be considered as solid solvents for a rubber which function by solubilizing the smaller tack-bestowing molecules from their dispersion in the mass of a rubber. 

Pressure-sensitive adhesives are permanently tacky and flow under pressure to provide intimate contact with the adherend surface. Pressure-sensitive tapes are made by placing these adhesives on a backing material such as rubber, vinyl, canvas, or cotton cloth. After pressure is applied, the adhesive tightly grips the part being mounted as well as the surface to which it is affixed. The ease of application and the many different properties that can be obtained from elastomeric adhesives account for their wide use. 

Elastomeric adhesives are natural or synthetic polymers with superior toughness and elongation. Examples of elastomeric adhesives include natural rubber, reclaimed rubber, butyl rubber, polyisobutylene, nitrile rubber, styrene-butadiene-rubber, etc.l Elastomeric adhesives are supplied as solvent solutions, latex cements, pressure sensitive tapes, and single- or multi-component nonvolatile liquid or pastes.[ 1 However, they are usually supplied in liquid form. Most are solvent dispersions or water emulsions. The service temperature is up to 204°C (400°F). They never melt, have excellent flexibility, but low bond strength. The main application of elastomeric adhesives is on unstressed joints on lightweight materials (e.g., joints in flexure). Hence, they are not considered structural adhesives. 

Pressure-sensitive Natural rubber, SIS block copolymer. Butyl Tapes, labels... 

A patent d issued in 1952 described the use of copolymers of higher acrylate or methacrylate esters with acrylic acid or methacrylic acid in the preparation of improved pressure sensitive tapes and liners for adherent rubber surfaces. The carboxyl content of these copolymers was so high that they could be considered to be plasticized polyacrylic acids rather than carboxylic elastomers. 

The process of masticating and dissolving natural rubber is important for pressure sensitive formulation as well as for solvent cement production. Pressure sensitive tapes and labels based on natural rubber are a significant part of the rapidly growing pressure sensitive adhesive... 

Environmental concerns, which have resulted in restrictions on the use of organic solvents, have been the impetus for a strong interest in the use of rubber latexes in the formulation of pressure sensitive tapes and labels, can sealants, and contact adhesives. The availability of suitable rubber latexes and tackifying resin dispersions have made this change pos-... 

Pressure sensitive adhesives constitute the fastest growing segment of the rubber-based adhesive industry. A variety of pressure sensitive tapes and labels are available, such as ... 

Insulation Sleeving, Flexible Silicone Rubber Coated Glass Vinyl, Flexible, Transparent, Optical Quality Thermoset Epoxy Sheet, Glass Reinforced Thermoset Phenolic, Cotton Reinforced, Moisture Resistant Nylon Plastic, Flexible Molded or Extruded Insulation Tape, Electrical, Pressure Sensitive Silicone Rubber Treated Glass... 

Rubber-based solvent cements are adhesives made hy combining one or more rubbers or elastomers in a solvent. These solutions are further modified with additives to improve the tack or stickiness and the degree of peel strength, flexibility, and the viscosity, or body. Rubber-based adhesive is used in a wide variety of applications, such as contact adhesive from plastic laminates used for counter tops, cabinets, desks, and tables. Adhesive is used on pressure-sensitive tapes as floor tile adhesive and carpeting adhesive. Self-sealing envelopes and shipping containers use rubber cements. Solvent-based rubber adhesives have been the mainstay of the shoe and leather industry. 

A number of higher poly(vinyl ether)s, in particular the ethyl and butyl polymers, have found use as adhesives. When antioxidants are incorporated, pressure-sensitive adhesive tapes from poly(vinyl ethyl ether) are said to have twice the shelf life of similar tapes from natural rubber. Copolymers of vinyl isobutyl ether with methyl acrylate and ethyl acrylate (Acronal series) and with vinyl chloride have been commercially marketed. The first two products have been used as adhesives and impregnating agents for textile, paper and leather whilst the latter (Vinoflex MP 400) has found use in surface coatings. 

Thermoplastic block copolymers were used for pressure-sensitive and hot-melt rubber adhesives as from the middle sixties. These adhesives found application in packaging, disposable diapers, labels and tapes, among other industrial markets. The formulation of these adhesives generally includes an elastomer (generally containing styrene endblocks and either isoprene, butadiene or ethylene-butylene midblocks) and a tackifier (mainly a rosin derivative or hydrocarbon resin). 

Pressure-sensitive adhesives (PSAs) based on acrylic, natural rubber and silicone are employed primarily for ease of application. To name Just a few applications, PSAs bond decals to surfaces, interior decorative surfaces to interior panels, interior trim pieces in place directly or hook and loop tape for the same purpose, structural shims in place during manufacturing and acoustic (sound deadening) materials to body skin interior surfaces. Tape products with pressure-sensitive adhesive on one or both surfaces are used for such functions as cargo compartment sealing, as a fluid barrier to prevent spills and leaks in the lavatories and... 

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