Manufactory regenerate, crude rubbers, different glues, products from latexes, glues and gummed prod
The increased tariffs applied by the Trump administration on Chinese imports are being introduced in stages. Let us know if you have further questions Ask us a question. Filtering or purifying machinery and apparatus for gases, other than intake air filters. Self-propelled works trucks not powered by an electric motor, rider type forklift trucks. Lathes including turning centers , other than horizontal or vertical turret lathes, for.VIDEO ON THE TOPIC: Continuous Production of Hot Melt Pressure Sensitive Adhesive (HMPSA )
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Patented Mar. Tierney, St. Paul, Minn. Paul, Minn a corporation of Delaware No Drawing. This application is a continuation of copendin application Ser. This material is a linear eupolymer superpolymer having a chain structure composed of many units, each unit of which may be represented by the following structural formula:. The desired eupolymer is formed by polymerization of the acrylic acid ester and polymerization is readily carried to the point where the polymer chain length results in a rubbery mass, which is quite different from resins which are soft and plastic and from resins which are horny or hard and brittle or relatively inflexible.
These non-tacky rubbery acrylate polymers, with which this invention is concerned, fall within the generic class of elastomers see Industrial and Engineering Chemistry. Thus a methyl acrylate elastomer superficially somewhat resembles white latex rubber, although it is water white and more transparent.
However, this material is not a mere substi tute or equivalent of natural rubber, for it possesses special properties making for suitability for the present use which are not possessed or suggested by natural rubber, and natural rubber cannot be substituted for the present material to produce the desired type of adhesive tape. The present material is not the same in properties as methacrylate polymers, and is to be distinguished therefrom.
An object of the invention is to provide an improved masking tape for use in painting, as for example, in the spray-painting of automobiles 4 Claims. Masking tapes heretofore have largely been 01 the following three types as regards the material used to impregnate or coat the backing: a those having a paper backing impregnated with a unifying composition which is insoluble in oils and lacquer solvents but which is undesirably hygroscopic exemplified by tanned glueglycerine.
Without going into details, it may be said that each of these types has disadvantages. An object of this invention is to provide not merely a novel masking tape but one which is superior in various respects. The problem of devising a superior masking tape is a very diflicult one, owing to the large number of desired properties which should be present in combination.
The usual difllculty is that in securing certain desired properties there is an accompaniment of undesirable properties following from the inherent nature of the materials used. The present invention provides a maskin tape having a backing which not only can be produced at a reasonable cost but which includes these desirable properties in combination: The.
The backing is not only proof against water penetration but is proof against the action or penetration of oils and many of the usual lacquer and enamel solvents. In lacquer and enamel spraying, the backing provides a barrier which prevents color bleeding, that is prevents the penetration of coloring material in colored lacquers, discoloring the underlying surface when the work is baked in an oven with the tape in place following spraying.
It is not necessary to provide a backsizing, since the back surface, provided by the polyacrylate elastomer used to impregnate or coat the backing, is of a kind toward which rubber-resin pressure-sensitive adhesives do not have a special afilnity, thus permitting rolls of the tape to be readily unwound and without exerting a strong pull tending to cause splitting of the backing.
The masking tape has the desired flexibility or pliancy and lack of harshness; but at the same time has the desired "body so as not to be limp; without being rendered heavy. It has -'-acrylate elastomer forf'coating or withoutcare being needed. This paper tape is tough enough to prevent accidental breaking or tearing.
The usual types of normally Itacky-:pressuresensitive adhesive coatingsmay beappliedto the backing and will adhere sufliciently flrmly so. Insteadofusing a solution of thefnon-tacky polyacrylate elastomerin a, solvent, an artificial latextype of dispersion oremulsionmay be employed; While, the '-elastomer itself.
Ihe finished backing contains'a weight of radiation by use. Example A web of creped towelling paper of porous o1 bibulous nature, having a weight of 27 lbs. Ethylene dichloride is another example of a suitabl'e volatile solvent, which can be used in place I I then coated on one face with a pressure-sensitive adhesive, as by passing the backing through a knife-coater in which a solution of, the adhesive is applied,1i. It is :not. Ultra-violet light hastens polymerization.
LThe aqueous dis-' lilatex crepe rubbers The rubber" t me; above formula maybejlsubstitute'd for by an isobutylene polymer elaston er a'transparent rubbery mass. Various other tack-producing resins may be" used in place of the hydrogenated rosin. Thus eupolymers of methyl acrylate, ethyl acrylate and methylethyl acrylate may be compounded with a compatible tack-producing material: acrylate polymer which issoft and tackyias distinguished used in whole or in part as theztack-producing agent to produce apressure-sensitive adhesive wherein the non-tacky eupolymer elastomer provides a'toughiand rubbery body of.
It maybe made in whole or in part from wood, rope or rag fibres, or from other fibrous material, natural or synthetic, adapted to the making of thin flexible sheet material of adequate porosity and adequate tensile strength after impregnation.
Glass fabrics can be used, the acrylate elastomer having a strong bonding action upon glass. Desirable types of especially thin unified paper can be made by using paper stock of a hemp fibre kind. Another example is Troya Tissue, made from new manila hemp fibres and characterized by the factthat the fibres largely run in one direction,- sothat tapes can be made having a high lengthwise tensile strength shoe tapes, sealing tapes, edging tapes, surgical tapes, etc.
Double-coated tape can be made, in which the backing impregnated iwith the polyacrylate elastomer is coated on both sides with pressuresensitive adhesive. If it is desired to use a particular type of pressure-sensitive adhesive which is of a nature having an afllnity for polyacrylate elastomers such that adhesive tape having a backing impregnated or back-sized with the non-tacky polyacrylate elastomer cannot be readily unwound from rolls thereof due to the adhesive surface strongly adhering to the back surface which it contacts, and it is not desired to use a liner, this difilculty can obviously be overcome by back-sizing the tape with a coating of material toward which the adand a high crosswise tear resistance.
Dextilose" is a hemp fibre paper which has substantially the same lengthwise and crosswise tensile strength and tear resistance. The invention is not limited to true paper as the backing. Thus a fabric of carded cotton fibres can be used. Various felted fabrics can be em ployed. All of these are to be understood as embraced within the term paper as used in the claims, distinguishing from woven fabrics.
However, woven fabrics can also be used. The fibrous backing need not be entirely saturated or impregnated with the polyacrylate elastomer. For example, a paper or cloth may be coated on one side with the non-tacky acrylate elastomer and on the other side with the pressure-sensitive adhesive, the two coatings penetrating sumciently for anchorage and unification.
Or the fabric may be coated on both sides with the acrylate elastomer, and then coated with the adhesive. Even in the case of paper, penetration need not necessarily extend to the centre, particularly if an adhesive of mildly tacky nature is used. It has been mentioned that the non-tacky polyacrylate elastomer may be used alone, which is a valuable feature.
However, it is not to be understood that compounding is excluded from the scope of the invention. Thus the acrylate elastomer may be loaded with fillers, such as zinc oxide, carbon black, whiting and clay, such as are used in rubber compounding. Compatible resins may be incorporated. Plasticizers, softeners and other modifying agents may be used, but ordinarily are unnecessary. Other compatible polymers may be blended, such as styrene and vinyl resins for example, polyvinyl acetate and polyvinyl chloride.
Or, instead of using mixed polymers, the acrylate may be copolymerized with another polymerizable material such as styrene, vinyl acetate or vinyl chloride, in proportions suitable for producing an elastomer. Mixtures or blends of polyacrylate elastomers may be used as for example, a mixture of the methyl acrylate and ethyl acrylate forms ; or co-polymers can the methyl and ethyl types in which each molecule contains some methyl and some ethyl groups.
Thus a methyl-ethyl co-polymer containing ethyl groups is very satisfactory. This latter backsizing may be applied over a back-sizing of the non-tacky polyacrylate elastomer if that is employed. The bonding of the pressure-sensitive adhesive coating to the backing may be increased by using an intermediate primer coating of a character which bonds firmly to the backing and to the adhesive coating.
Thus the kinds ofpressuresensitive adhesive which may be employed are not limited to those which form a direct strong bond to a backing impregnated, or sized on the inner face, with a polyacrylate elastomer.
Such primer may be a blend or mixture of polyacrylate elastomer and one or more of the organic components of the adhesive, so that one phase bonds strongly to the backing and another to'the adhesive coating; the primer thus linking the two together. Having described various embodiments of my invention for purposes of illustration, but without intent to 'be limited thereto, what I claim is as follows:. A pressure-sensitive adhesive tape comprising a flexible fibrous backing impregnated and unified by a non-tacky polyacrylate elastomer of the class consisting of methyl acrylate polymers, ethyl acrylate polymers and co-polymers of methyl and ethyl acrylates, and a normally tacky and pressure-sensitive non-offsetting adhesive coating firmly united to the backing.
A pressure-sensitive adhesive tape wound in roll form and comprising a bibulous paper backing impregnated and unified by a non-tacky polyacrylate elastomer of the class consisting of methyl acrylate polymers, ethyl acrylate polymers and co-polymers of methyl and ethyl acrylates, and a normally tacky and pressure-sensitive non-offsetting adhesive coating firmly united to one side of the backing, said backing being resistant to splitting or delamination when the adhesive tape is unwound from a roll or removed from surfaces to which temporarily applied.
A masking tape wound in roll form and comprising a stretchable porous paper backing impregnated and unified by a non-tacky polyacrylate elastomer of the class consisting of methyl acrylate polymers, ethyl acrylate polymers and co-polymers of methyl and ethyl acrylates, and a normaly tacky and pressuresensitive non-offsetting adhesive coating firmly united to one side of the backing, said tapehaving a dead-stretch characteristic and being readily conformed to irregular or curved outlines and surfaces, and the impregnated backing serving as a barrier to penetration of water and oils.
A masking tape according to claim 3 wherein W ms m the polyacrylate elastomer is a co-polymer of STA PA a methyl and ethyl acrylates. This application De. This material is a linear eupolymer superpolymer having a chain structure composed of many units, each unit of which may be represented by the following structural formula: where R represents an alkyl group, such as methyl or ethyl -CzHs , or such other group as permits of polymerization to non-tacky elastomerform.
The present invention provides a maskin tape having a backing which not only can be produced at a reasonable cost but which includes these desirable properties in combination: The backing is treated with a material which is nonhygroscopic and water-insoluble so that it is not affected by atmospheric conditions.
It is :not such-as the "mono-sodium 'saltof the'sulfonic' r acidester of lauryl alcohol with a polymeriza tion catalyst such I as aperoxide or I ammonium 'persulf'ate. I 1 Instead of using a preformed'non-tacky-poly-- impregnating the fabrim'the elastomer may be formed in 'situ. The LThe aqueous dis-' lilatex crepe rubbers The rubber" t me; above formula maybejlsubstitute'd for by an isobutylene polymer elaston er a'transparent rubbery mass.
Thus electrical tapes, protective tapes, be used, such as copolymers of. Having described various embodiments of my invention for purposes of illustration, but without intent to 'be limited thereto, what I claim is as follows: 1. US USA en USA en.
The adhesive composition for permanently adhesive and pressure-sensitive adhesive tapes. Cellulosic product comprising saturated fibrous web having a coating comprising vinyl resin and alkyl acrylate-carboxylic acid plasticizer. USB1 en. Pressure-sensitive film composite having improved adhesion to plasticized vinyl substrates. USB2 en. Pressure sensitive adhesives from diesters of fumaric acid and vinyl compounds copolymerizable therewith. EPB1 en. CAA en. Water-dispersible pressure-sensitive adhesive, tape made therewith, and novel tackifiers therefor.
Abrasion Resistance - The ability of a tape to withstand rubbing or wearing away by friction and still function satisfactorily. Accelerated Aging - A method in which pressure sensitive materials are subjected to special environmental conditions in order to measure the effects of natural aging in a shorter period of time. Acrylic Adhesive - A pressure sensitive, viscoelastic blend of acrylic-based high strength polymers which may be modified by tackifying additives. Acrylic adhesives are a very broad class of materials and come in many types to achieve different properties.
Rubber cement is an adhesive made from elastic polymers typically latex mixed in a solvent such as acetone , hexane , heptane or toluene to keep them fluid enough to be used. This makes it part of the class of drying adhesives : as the solvents quickly evaporate, the rubber solidifies, forming a strong yet flexible bond. Rubber cement is simply a mixture of solid rubber in a volatile solvent that will dissolve it. When the cement is applied, the solvent evaporates, leaving the rubber as the adhesive.
US2438195A - Pressure-sensitive adhesive tape - Google Patents
Usually ships within 5 days. Animal glues are essentially natural high-polymer proteins. These organic colloids are derived from collagen which is the. There are two principal types of animal glues, hide and. In both cases,. Animal glues find application in a wide range of industrial. They are used in woodworking for such applications as. In the paper industry,. Animal glues find wide use during. The coated abrasive industry uses animal glues in the.
Excise Notice AGL2: industrial and agricultural processes relief
By: Beth W. McMinn and Jill B. Prepared for U. It presents information from sources including literature searches, industry questionnaires, plant visits, pollution prevention experts, and industry and trade association personnel. NOTE: Phase n activities will be the actual demonstration of selected alternative technologies, and Phase El will be to transfer related technology by means of conference papers, journal articles, and newsletters, prepared and presented at industrial workshops, pollution prevention conferences, and other events where industrial application of pollution prevention technologies is discussed.
Brake cleaner with excellent dissolving properties. Brake Cleaner leaves no residue and is non-conductive and noncorrosive. MoTip Brake Cleaner has a powerful jetspray and can be used in various positions. Dries in a few minutes.
Commodity Codes. Name of Individual or Business Entity. Erie , Pennsylvania.
Specialty and Industrial Coatings. Inks and Printing. Intermediates and Solvents. Skin and Sun Care. Paper and Coatings.
WO2003059756A2 - Biodegradable or compostable containers - Google Patents
This article begins with an overview of the fundamentals of adhesive technology, including functions, limitations, adhesive joint types, and the key factors in the selection of adhesives, including application, type of joint, process limitation, mechanical requirement, and service conditions. It then focuses on the characteristics, types, and properties of the five groups of adhesives, such as structural, hot melt, pressure sensitive, water based, ultraviolet, and electron beam cured adhesives. The article also discusses the functions and applications of adhesive modifiers, including fillers, adhesion promoters, tackifiers, and tougheners. It gives a short note on functions of primers and primerless bonding. Applications of adhesives in automotive, aerospace, electronics, electrical, medical, sports, and construction sectors are also described.
Glossary of Terminology
Handbook of Adhesion Technology pp Cite as. There is a pervading presence of adhesive joints in nature. Adhesive secretions are used by organisms for attachment, construction, obstruction, defense, and predation. Most natural materials are hybrid materials combining organic and inorganic building blocks.
Patented Mar. Tierney, St. Paul, Minn.
Ему была видна задняя дверца: как это принято в Севилье, она оставалась открытой - экономичный способ кондиционирования. Все внимание Беккера сосредоточилось на открытой двери, и он забыл о жгучей боли в ногах.
Задние колеса уже остались за спиной - огромные, доходящие ему до плеч скаты, вращающиеся все быстрее и быстрее. Беккер рванулся к двери, рука его опустилась мимо поручня, и он чуть не упал.
Фонтейн кивнул. Иерархия допуска в банк данных была тщательно регламентирована; лица с допуском могли войти через Интернет. В зависимости от уровня допуска они попадали в те отсеки банка данных, которые соответствовали сфере их деятельности. - Поскольку мы связаны с Интернетом, - объяснял Джабба, - хакеры, иностранные правительства и акулы Фонда электронных границ кружат вокруг банка данных двадцать четыре часа в сутки, пытаясь проникнуть внутрь.
- Да, - сказал Фонтейн, - и двадцать четыре часа в сутки наши фильтры безопасности их туда не пускают.
Это не лишено смысла. Джабба сразу понял, что Сьюзан права. Энсей Танкадо сделал карьеру на простых числах. Простые числа - главные строительные блоки шифровальных алгоритмов, они обладали уникальной ценностью сами по .