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Wyszukujesz frazę "pressure-sensitive" wg kryterium: Temat


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Tytuł:
Sieciowanie samoprzylepnych klejów silikonowych
Crosslinking of silicone pressure-sensitive adhesives
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172358.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
polimery
silikonowe kleje samoprzylepne
pressure-sensitive adhesives
polimer
silicone pressure sensitive adhesives
Opis:
Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [1–4]. Since 1960s, silicone pressure-sensitive adhesives have found many uses. They are used in industrial plants, as tapes for joining materials with low surface energy, as well as in the sectors of electrical and electronic, medical care, health care and automotive industry. For about 10 years there has been great interest in new uses for the silicone PSA, particularly for medical and industrial belts. The above examples describe a growing range of potential commercial applications of silicone pressure- -sensitive adhesives. Silicone pressure-sensitive adhesives typically consist of large segments of the silane-functional silicone polymers and silicone resins (MQ). It is well known that silicone pressure-sensitive adhesives because of their unique properties are special-purpose products. The combination of the properties of silicones such as high flexibility of connections Si-O-Si, low intermolecular interaction, low surface tension, excellent thermal stability and transparency for UV radiation, excellent electrical properties, high chemical resistance and weather resistance makes silicone adhesives have improved properties compared to other typical polymeric organic adhesives. Due to the low surface tension of silicone adhesives, adhesive is easily spread on the surface of various materials [4–9]. The properties of silicone pressure sensitive adhesives (Si-PSA) crosslinking thermally by organic peroxides (according to a radical mechanism) depend on the type and concentration of crosslinker used. Benzoyl peroxide (BPO) and 2,4-dichlorobenzoyl peroxide (DClBPO) are the most commonly used peroxides the industry. Increasing the content of BPO or DClBPO in a predominantly affects significantly increase the cohesion, while reducing the adhesion of tested adhesives [1, 5, 6]. With the market testing of pressure sensitive adhesives and literature studies clearly show that there were no studies to date on the process of UV-curing silicone pressure sensitive adhesives; and there is no sales sided adhesive tapes, silicone crosslinked by UV radiation.
Źródło:
Wiadomości Chemiczne; 2016, 70, 1-2; 25-32
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ napełniaczy krzemowych na właściwości samoprzylepnych klejów silikonowych
Influence of silicone fillers on silicone pressure-sensitive adhesives properties
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172170.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
kaolin
montmorylonit
silikonowe kleje samoprzylepne
pressure-sensitive adhesives
montmorilonite
silicone pressure-sensitive adhesives
Opis:
Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [2, 6–8]. Since 1960s, silicone pressure-sensitive adhesives have found many uses. They are used in industrial plants, as tapes for joining materials with low surface energy, as well as in the sectors of electrical and electronic, medical care, health care and automotive industry. For about 10 years there has been great interest in new uses for the silicone PSA, particularly for medical and industrial belts. The above examples describe a growing range of potential commercial applications of silicone pressure-sensitive adhesives [2, 7, 9–11]. In contrast to the pressure-sensitive adhesives organic silicone pressure-sensitive adhesives show much better performance by this well known it happened that are used to obtain self-adhesive materials for special purposes. Si-PSA usually consist of large segments of the silanol-functional silicone polymers, and silicone resins. Polymeric chains comprising the silicone resins include methyl and phenyl groups thus are very little reactive chemicals. In order to obtain the best adhesion-cohesion balance are used crosslinked thermally in a temperature range of 120–150°C by using organic peroxides. Peroxides most commonly used in industry benzoyl peroxide (BPO) and 2,4-dichlorobenzoyl peroxide (DClBPO). Silicone pressure- -sensitive adhesives are characterized by high flexibility of connections Si-O-Si, low impact intermolecular, low surface tension, excellent thermal stability and transparency for UV radiation, excellent electrical properties, high chemical resistance and weather resistance [2, 6, 7, 14]. In the available literature the montmorillonite and kaolin modified silicone pressure-sensitive adhesives which exhibited increased thermal resistance are reported. The thermal properties of adhesives compositions are better to compared with “pure” silicon composition without any filler [6, 12–14].
Źródło:
Wiadomości Chemiczne; 2016, 70, 11-12; 761-769
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przewodzące samoprzylepne kleje akrylanowe z napełniaczami węglowymi
Conductive acrylic pressure-sensitive adhesives with carbon filler
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172375.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
przewodzące kleje samoprzylepne
polimery
samoprzylepne kleje akrylanowe
adhesives
conductive pressure-sensitive adhesives
polymer
acrylic pressure-sensitive adhesives
Opis:
Pressure-sensitive adhesives (PSA) are a group of adhesive-based macromolecular polymers which are characterized by good (satisfying the requirements of industrial) adhesion and cohesion; high temperature stability during use, excellent aging resistance and constant tear strength. In 1935, the concept of self-adhesive glue, wherein the obtained self-adhesive product of the invention R. Stanton Avery, was firstly developed. From many types of adhesives, the most common adhesives are acrylics pressure-sensitive adhesives [1–3]. In most cases, self-adhesive adhesives do not exhibit good conductive properties, whereas conductivity grades are classified in the group of insulators. In order to improve their conductive properties, studies have been conducted on the modification of polymers in adhesive compositions, where at least one of the components exhibited conductive properties (e.g. polymers with conjugated π-bonded polymers along polymeric chains). However, the best effects were obtained by adding conductive fillers such as metal (copper, aluminum), specially modified soot, nanotubes or graphene, carbon fibers, metallized glass and conductive fibers. This allowed the creation of electrically conductive compositions characterizing by conductivity in the range from 10–2 to 102 S/cm. This relatively high conductivity is the result of the percolation of conductive filler molecules into an insulating matrix or tunneling between electrically conductive molecules [10, 11]. Acrylate pressure-sensitive adhesives with conductive fillers have found a number of important industrial applications, especially in the electronics industry. Pressure- sensitive adhesives, such as self-adhesive tapes or adhesive films, are used as heating elements, sensors or conductive gums. Due to their good performance, they can be used to connect solar panels or glue small components in the microelectronics industry. They also can be used to discharge static charges from the surface – used as flexible drainage connections – especially in places where the spark is undesirable and can be dangerous. They are used as heating elements [10, 12, 27].
Źródło:
Wiadomości Chemiczne; 2017, 71, 11-12; 887-896
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ organicznych środków sieciujących na właściwości fizyczne klejów samoprzylepnych na bazie silikonów
Influence of organic crosslinkers on physical properties of pressure-sensitive adhesives based on silicones
Autorzy:
Antosik, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/101860.pdf
Data publikacji:
2015
Wydawca:
Politechnika Lubelska. Polskie Towarzystwo Promocji Wiedzy
Tematy:
kleje samoprzylepne (PSA)
silikonowe kleje samoprzylepne (Si-PSA)
BPO
DClBPO
pressure-sensitive adhesives (PSA)
silicone pressure-sensitive adhesives (Si-PSA)
Opis:
Kleje samoprzylepne (PSA) mogą być zdefiniowane jako specjalna grupa klejów, które w postaci filmu klejowego posiadają właściwości samoprzylepne (w temperaturze pokojowej).Oprócz dobrej przyczepności powierzchniowej charakteryzują się dobrą stabilnością adhezji w dużej rozpiętości temperaturowej. Silikonowe kleje samoprzylepne (Si-PSA) charakteryzują się również obojętnością chemiczną i odpornością na warunki atmosferyczne. Są one szeroko stosowane do produkcji taśm i etykiet samoprzylepnych używanych gdy otoczenie lub powierzchnia podłoża przekracza możliwości przylepcowe typowych organicznych klejów samoprzylepnych. Właściwości samoprzylepnych klejów silikonowych (Si-PSA) sieciowanych termicznie organicznymi nadtlenkami (według mechanizmu rodnikowego) zależą od rodzaju oraz stężenia zastosowanych związków sieciujących. Zwiększenie stężenia nadtlenku benzoilu lub nadtlenku dichlorobenzoilu w układzie wpływało na ogół na znaczne zwiększenie kohezji, przy jednoczesnym zmniejszeniu adhezji badanego kleju.
Pressure-sensitive adhesives (PSAs) can be defined as a special category of adhesives which in dry form are permanently tacky at room temperature. Pressure-sensitive adhesives require certain properties: good surface adhesion, good stability of adhesion characteristics is constant over a very wide temperature range. Siliconepressure-sensitive adhesives (Si-PSA) are characterized by chemical indifferenceandweather resistance. They are widely used in pressure-sensitive tapes and labels for applications when environmental conditions or the nature of substrate surfaces transcend the performance boundaries of common organic pressure-sensitive adhesives. The properties of thermally crosslinked silicone pressure-sensitive adhesives (Si-PSA) using organic peroxides (according to a radical mechanism) depend on the type and concentration of used crosslinker. Increasing the content of benzoyl peroxide or dichlorobenzoyl peroxide in the system affected (generally) increasing cohesion, while reducing the adhesion of the tested adhesives.
Źródło:
Journal of Technology and Exploitation in Mechanical Engineering; 2015, 1, 1-2; 96-106
2451-148X
Pojawia się w:
Journal of Technology and Exploitation in Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acrylic Pressure-Sensitive Adhesives Containing SiO2 Nanoparticles
Autorzy:
Czech, Z.
Kowalczyk, A.
Ortyl, J.
Świderska, J.
Powiązania:
https://bibliotekanauki.pl/articles/779344.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
pressure-sensitive adhesives
SiO2 nanoparticles
tack
peel adhesion
shrinkage
Opis:
The use of acrylic pressure-sensitive adhesives (PSAs) is increasing in a variety of industrial fi elds. They have been applied in the manufacture of mounting tapes, self-adhesive labels, protective fi lms, mas king tapes, splicing tapes, carrier-free tapes, sign and marking fi lms, and in diverse medical products, such as pads or self-adhesive bioelectrodes. In this study, the application of SiO2 nanoparticles in acrylic PSA was investigated. The properties of the newly synthesized and modifi ed PSA were evaluated via the tack, peel adhesion, shear-strength and shrinkage. It has been found that the nanotechnologically-reinforced systems consisting of monodisperse non-agglomerated SiO2 nanoparticles and self-crosslinked acrylic PSAs showed a great enhancement in tack, peel adhesion, shear resistance and shrinkage, without showing the disadvantages known to result from the use of other inorganic additives. In this paper we evaluate the performance of SiO2 nanoparticles with a size of about 30 nm as inorganic fi ller into the synthesized solvent-borne acrylic PSA.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 1; 12-14
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aparatura do powlekania klejów samoprzylepnych
Coating machine for application of pressure-sensitive adhesives
Autorzy:
Czech, Z.
Gracz, K.
Kowalczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/270722.pdf
Data publikacji:
2013
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
klej samoprzylepny
powlekarka do klejów samoprzylepnych
konstrukcja powlekarki
gramatura kleju
pressure-sensitive adhesive
coating machine for pressure-sensitive adhesives
construction of coating machine
coating weight
Opis:
Właściwości klejów samoprzylepnych w postaci dwustronnych, jednostronnych oraz transferowych materiałów samoprzylepnych, takich jak typowe taśmy montażowe, etykiety samoprzylepne, folie reklamowe czy też samoprzylepne materiały medyczne, zależą między innymi od gramatury zastosowanego kleju. Kleje samoprzylepne nanosi się w laboratorium na folię poliestrową bądź silikonowany papier dehezyjny przeważnie za pomocą ręcznych aplikatorów w postaci ramek, umożliwiających tylko nanos kleju o czterech różnych gramaturach. Powlekanie kleju o dowolnej gramaturze jest tym samym niemożliwe. Nowo skonstruowana półautomatyczna powlekarka umożliwia powlekanie klejów samoprzylepnych, farb oraz lakierów o dowolnej gramaturze w zakresie od 3 g/m2 do 3000 g/m2, co odpowiada grubości warstwy polimerowej od 0,003 mm do 3 mm.
Properties of pressure-sensitive adhesives in form of one-sided, double-sided or carrier-free self-adhesive materials, like typical mounting tapes, self-adhesive labels, decoration films or self-adhesive medical products are among other things dependent on adhesive coating weight. Pressure-sensitive adhesives are coated on polyester film or dehesive silicon paper using hand equipments in form of hand-coaters which make possible only four diverse coatings weights. With this kind of equipment is not possible coating of adhesive with selected each coating weight. The new constructed half-automatic coating machine allows the coating of pressure-sensitive adhesives, paints or lacquers in the range coating weights between 3 g/m2 and 3000 g/m2 what corresponds to layers with thickness between 0.003 mm to 3 mm.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2013, 18, 3; 229-232
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Klasyfikacja klejów samoprzylepnych ze względu na rodzaj polimeru
Classification of pressure-sensitive adhesives according to basic polymer kind
Autorzy:
Antosik, Adrian Krzysztof
Antosik, Nataniel Adrian
Licbarski, Adam
Powiązania:
https://bibliotekanauki.pl/articles/972304.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
polimery
adhezja
kohezja
pressure-sensitive adhesives
polymer
adhesion
cohesion
Opis:
Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. They are nonmetallic materials used to bond other materials, mainly on their surfaces through adhesion and cohesion. Adhesion and cohesion are phenomena, which may be described thermodynamically and chemically, but actually they cannot be measured precisely. It was shown that the most important bonding processes are bonding by adhesion and bonding with pressure-sensitive adhesives. They can be describe as a special category of adhesive which in dry form are permanently tacky at room temperature and adheres to a substrate under light pressure after what can be removed cleanly, on demand, without leaving residues on the substrate; mechanically - soft, sticky substance [1-7]. One of the most popularly classification of pressure-sensitive adhesives are division according to basic polymer kind. PSA are divided on seven groups in this classifications respectively acrylic, rubber, silicone, polyurethane, polyester, polyether and EVA pressure-sensitive adhesive [5, 7-8]. Market and technology of high-quality pressure-sensitive adhesives is growing very fast. This development is the result of expansion in both existing and new fields of application of pressure-sensitive adhesives. Self-sealing polymers used for production of pressure-sensitive adhesives is directly related to their structure, which makes them unique in the world. The global market for self-adhesive tapes was expanding by 5.5% per year. In 2012 it produced worldwide about 1700.5 kilotons pressure-sensitive adhesives with a value of $ 22.7 trillion. In 2018, an increase in world production was expected to reach around 2208.2 kilotons of self-adhesive adhesives valued at 31.64 billion USD, which has been approximately met, in the following years a further increase in the production of these materials is forecasted [1-3].
Źródło:
Wiadomości Chemiczne; 2019, 73, 9-10; 452-463
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fotoreaktwne poliakrylanowe kleje samoprzylepne
Photoreactive acrylics pressure-sensitive adhesives
Autorzy:
Kowalska, J.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/171714.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
kleje fotoreaktywne
sieciowanie
pressure-sensitive adhesives
photoreactive adhesives
crosslinking
Opis:
Pressure-sensitive adhesives (PSAs) are non-metallic materials used to bond other materials, mainly on their surfaces through adhesion and cohesion. Adhesion and cohesion are phenomena, which may be described thermodynamically and chemically, but actually they cannot be measured precisely. It was shown that the most important bonding processes are bonding by adhesion and bonding with pressure- -sensitive adhesives. The difference between pressure-sensitive adhesives and other adhesives, such as contact adhesives, is in the permanent surface stickiness of the pressure-sensitive adhesives before, or after, the application. The fastest developing polymers departments are: initiating UV photopolymerization and photocrosslinking. Ultraviolet radiation (UV) part of the electromagnetic radiation having a wavelength of 100 to 400 nm, the practical use has an area of 200 to 400 nm. UV radiation does not cause visual impressions results in a strongly fluorescence, photoelectric, photochemical reactions and has a high biological activity. It is particularly important industrial use of UV crosslinking which is used in the manufacture of a wide range of self-adhesives, such as assembly lines, labels, decorative films, protective films, patches and biomedical electrode. Especially important critical point during UV-curing is the balance between adhesion and cohesion of the crosslinked pressure-sensitive adhesive layer. An important element is finding the appropriate beneficial relationship between tack, adhesion and cohesion of the crosslinked pressure-sensitive adhesives that offer assurance to their respective industrial applications. Ultraviolet radiation crosslinking is carried out at room temperature and does not require high temperatures, an important disadvantage pressure-sensitive adhesives crosslinked by heat. Compared to systems crosslinked thermally, the use of UV crosslinking process provides greater speed and effective a crosslinking process, and also does not damage the materials with low thermal resistance.
Źródło:
Wiadomości Chemiczne; 2016, 70, 7-8; 541-551
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jednostronnie klejące taśmy na bazie samoprzylepnych klejów silikonowych – dobór najlepszej kompozycji
One side self-adhesives tapes based on silicone pressure-sensitive adhesives – selections of the best compositions
Autorzy:
Antosik, A. K.
Bednarczyk, P.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/141950.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
taśmy samoprzylepne
silikony
kleje samoprzylepne
self-adhesives tape
silicone
pressure-sensitive adhesives
Opis:
Silikonowe kleje samoprzylepne składają się zazwyczaj z dużych segmentów silano-funkcyjnych polimerów silikonowych oraz żywic silikonowych (MQ). Powszechnie wiadomo, że silikonowe kleje samoprzylepne, ze względu na swoje unikalne właściwości, są produktami specjalnego zastosowania. Kombinacja właściwości silikonów, takich jak wysoka elastyczność połączeń Si–O–Si, niewielkie oddziaływanie międzycząsteczkowe, niskie napięcie powierzchniowe, doskonała stabilność termiczna oraz transparentność dla promieniowania UV, doskonałe właściwości elektryczne, duża odporność chemiczna oraz odporność na warunki atmosferyczne sprawia, że kleje silikonowe posiadają lepsze właściwości w porównaniu do innych typowych polimerowych klejów organicznych. W pracy przedstawiono dobór najlepszych kompozycji klejów silikonowych do otrzymywania jednostronnie klejących taśm samoprzylepnych.
Silicone pressure-sensitive adhesives are usually comprised of high-molecular-weight silanol-functional silicone polymers and siloxane resins (MQ). It is well known that silicone adhesives are products of special use. Combination of the unique properties of silicones, such as high Si–O–Si backbone flexibility, low intermolecular interactions, low surface tension, excellent thermal stability and high UV transparency, often explains why silicone PSAs have superior performance at high- and low-temperature extremes, excellent electrical properties, chemical resistance and outstanding weathering resistance it makes they are superior compared to organic PSAs. The paper presents a selection of the best compositions of silicone adhesives for one-side pressure sensitive adhesive tapes.
Źródło:
Chemik; 2015, 69, 12; 862-867
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podział klejów rozpuszczalnych w wodzie ze względu na pochodzenie
Classification of water-soluble adhesives according to origin
Autorzy:
Mozelewska, K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/171549.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
kleje naturalne
kleje syntetyczne
kleje rozpuszczalne w wodzie
pressure-sensitive adhesives
natural adhesives
synthetic adhesives
water-soluble adhesives
Opis:
Self-adhesive adhesives have been known since 1935. Since then, many categories of their division have been distinguished, depending on their origin, state of aggregation, operating conditions, obtaining, chemical base or binding mechanism, as well as many other properties. The main is their application in natural and synthetic adhesives, that is due to the origin of the high molecular weight compounds used for their production. The following work describes the types of water-soluble natural and synthetic adhesives. In recent centuries, there has been a decline in the use of natural polymers for the synthesis of water-soluble pressure sensitive adhesives. This is due to the spread of cheaper products from petrochemical resources, but also better properties that they characterize. For their polymerization, synthetic monomers which hydrophilic groups (hydroxyl, amide or carboxyl) are used. These groups, in the further reaction stage, after polymerisation, give the possibility of cross-linking of the pressure-sensitive adhesive. Polyacrylate based adhesives are among the most commonly used adhesives. It is forecasted that the demand for such adhesives will increase on average by 2.9% per annum. Dispersive, water-soluble, self-adhesive adhesives and those in which the solvent is water also play an increasingly important role. This happens as a result of legal requirements, but also greater public awareness of ecology.
Źródło:
Wiadomości Chemiczne; 2018, 72, 1-2; 29-37
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Klasyfikacja klejów samoprzylepnych ze względu na proces otrzymywania
Classification of pressure-sensitive adhesives according to manufacturing process
Autorzy:
Antosik, K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172781.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
klej samoprzylepny
rozpuszczalnikowy klej samoprzylepny
bezrozpuszczalnikowy klej samoprzylepny
wodno-dyspersyjny klej samoprzylepny
pressure-sensitive adhesive
solvent-based adhesive
solvent-free adhesive
water-borne adhesive
Opis:
An adhesive is any substance that, when applied to the surfaces of materials, binds the surfaces together and resists separation. The basic ingredients are adhesive firming agents (binder), solvents, adhesion enhancing agents (plasticizers, coalescing agents), wetting agents, modifiers and stabilizers. There are many criteria for the distribution of adhesives taking into account their characteristics and purpose, of which the basic division is made according to their chemical base and the method of curing [1]. Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [2]. Pressure-sensitive adhesives require certain properties: besides a good surface adhesion, good stability against light, oxygen, moisture and plasticizers, and the adhesion characteristics is constant over a very wide temperature range. They are characterized by the excellent low constant level of peel strength and tack as well as the excellent aging performance at room or higher temperatures. The inherent tackiness of PSAs allow them to wet and adhere quickly under a low pressure on a broad variety of substrates [3]. There are many criteria for the division of PSA taking into account their characteristics and intended use, where the basic division is made according to their chemical base and a method for curing. In practice, the most commonly used criteria for the allocation of adhesives include: form (consistency), methods and fields of application, rate of binding, joint properties, quantities of ingredients, properties of the thermal adhesive layer or the production process [1]. Pressure-sensitive adhesives according to the manufacturing process can be divided into solvent-based, water-borne and solvent-free PSA (Fig. 2) [14–17]. The most commonly used high molecular compounds used in the manufacture of pressure-sensitive adhesives include natural rubber and synthetic copolymers of ethylene and acrylic acid, polisilicones, acrylics, linear polyesters, polyether, polyurethanes. The market and technology of high-performance PSAs are expanding rapidly. A growing market is the result of expansion in both current and new application areas. Self-adhesive polymers possess inherent properties due to their structure that make them unique [15]. The world market for pressure sensitive adhesives was valued at USD 22.70 billion in 2012 and is expected to reach USD 31.64 billion by 2018. The global pressure sensitive adhesives market volume was 1700.5 kilo tons in 2012 and is expected to reach 2208.2 kilotons by 2018 [18].
Źródło:
Wiadomości Chemiczne; 2015, 69, 1-2; 111-119
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pomiar kohezji klejów samoprzylepnych w wyższych temperaturach
Cohesion measurement of pressure-sensitive adhesives at higher temperatures
Autorzy:
Czech, Z.
Gracz, K.
Sowa, D.
Powiązania:
https://bibliotekanauki.pl/articles/270778.pdf
Data publikacji:
2013
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
klej samoprzylepny
kohezja
pomiar kohezji
wyższe temperatury
urządzenie do pomiaru kohezji
pressure-sensitive adhesive
cohesion
measurement of cohesion
higher temperatures
equipment for measurement of cohesion
Opis:
Najważniejszą właściwością klejów samoprzylepnych jest ich wytrzymałość wewnętrzna, nazywana inaczej kohezją. Kleje samoprzylepne o niskiej kohezji nie mogą być stosowane w praktyce przemysłowej do wytwarzania materiałów samoprzylepnych, służących do łączenia ze sobą różnorodnych materiałów. Zastosowanie takich klejów, ze względu na małą wytrzymałość spoiny klejowej, prowadzi w efekcie do kosztownych reklamacji. Kohezja klejów samoprzylepnych zależy od wielu czynników, jednak głównym parametrem wpływającym na kohezję jest rodzaj oraz stężenie, użytych w technologii klejów i materiałów samoprzylepnych, związków sieciujących. Kohezja klejów samoprzylepnych zależy również od temperatury jej pomiaru. Najczęściej bada się kohezję klejów samoprzylepnych w temperaturze pokojowej oraz w temperaturze 70°C. Do tych pomiarów, szczególnie do pomiaru kohezji w podwyższonych temperaturach, skonstruowano specjalną aparaturę, wykorzystując do tego celu komercyjną, przebudowaną suszarkę.
The important property of pressure-sensitive adhesives is their shear strength, known other as cohesion. Pressure-sensitive adhesives characterized by low cohesion cannot be used in industrial practice for manufacturing of self-adhesive materials applied for bonding of various substrates. The application of this kind of adhesives provide to low cohesion of bonding palaces and with it to complaints. The cohesion of pressure-sensitive adhesives depends on different parameters, but the main parameter is the kind and concentration of crosslinking agents used in the technology of adhesives and self-adhesive products. The cohesion of pressure-sensitive adhesives depends on measurement temperature too. Generally, the cohesion of pressure-sensitive adhesive is tested at room temperature and at 70°C. For these tests, especially for testing of cohesion at higher temperatures was constructed special equipment using for this goal drying machine.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2013, 18, 3; 239-244
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
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