CS209777B1

CS209777B1 - A method of gluing the soles of synthetic materials

Info

Publication number: CS209777B1
Application number: CS476179A
Authority: CS
Inventors: Rudolf Elias
Original assignee: Rudolf Elias
Priority date: 1979-07-06
Filing date: 1979-07-06
Publication date: 1981-12-31

Abstract

Vynález rieši problematiku úsporného zlepovania podošiev zo syntetických materiálov, ako je polyuretan, polyvinylchlorid alebo termoplastický kaučuk, ku zvrškom z prírodných alebo syntetických usní. Účelom vynálezu je úspora použitého polyuretanového lepidla nanášaného na zdrsněnu napínaciu záložku zvršku obuvi, ako aj úspora pracovných sil viazaných pri vlastnom nanášaní lepidiel, samozřejmé pri zachovaní doterajsích pevnosti spojov a ich teplostálosti až do 70 °C. Uvedeného účelu sa dosahuje, ak sa na zdrsněnu napínaciu záložku zvršku obuvi nanáša iba jeden nános polyuretanového lepidla so sušinou 22 až 24 % a na podošvu taktiež jeden nános toho istého lepidla so sušinou 18 až 20 pričom prídavok izokyanátového sieíovacieho prostriedku, přednostně přidávaného do lepidla na podošvu, nepřekračuje 16 až 18 hmotnostných percent. Možno podlá vynálezu postupovač tiež tak, čo je aj výhodnejšie, že sa celkové množstvo siečovacieho prostriedku rozdělí v podiely 8 až 12 Z do lepidla na napínaciu záložku a. v podiely 8 až 10 % do lepidla na podošvu.The invention solves the problem of economical bonding of soles made of synthetic materials, such as polyurethane, polyvinyl chloride or thermoplastic rubber, to uppers made of natural or synthetic leather. The purpose of the invention is to save the amount of polyurethane adhesive used, applied to the roughened tension tab of the shoe upper, as well as to save the labor involved in applying the adhesives themselves, of course while maintaining the existing strength of the joints and their temperature resistance up to 70 °C. The stated purpose is achieved if only one layer of polyurethane adhesive with a dry content of 22 to 24% is applied to the roughened tension tab of the shoe upper and one layer of the same adhesive with a dry content of 18 to 20% is applied to the sole, while the addition of isocyanate crosslinking agent, preferably added to the sole adhesive, does not exceed 16 to 18 weight percent. It is also possible according to the invention to advance the product in such a way, which is even more advantageous, that the total amount of crosslinking agent is divided into 8 to 12% in the tension tab adhesive and 8 to 10% in the sole adhesive.

Description

1 2097771 209777

Vynález rieši sposob zlepovania podošiev zo syntetických materiálový ako je polyuretan,polyvinylehlorid a termoplastický kaučuk, ku zvrškom obuvi z prírodných alebo póromerickýchusní, za použitia nánosov lepidiel na báze roztokov lineárnych polyesteruretanov s případnýmprídavkom sietovacích prostriedkov vo formě tri-/-p-izokyanátfenylesteru/ kyseliny tiofosfo-rečne j alebo polyfenylénpolymety1énizokyanátu.SUMMARY OF THE INVENTION The present invention relates to a method of bonding synthetic material soles such as polyurethane, polyvinyl chloride and thermoplastic rubber to natural or porous rubber footwear, using adhesives based on linear polyesterurethane solutions with optional addition of crosslinking agents in the form of tri - [beta] -isocyanate phenyl ester / thiophosphoic acid - clear or polyphenylene polymethylene isocyanate.

Ako je známe, používajú sa v obuvníckom priemysle v súčasnej době na prilepovanie podo-šiev z polyuretanu, polyvinylchloridu a z termoplastického kaučuku ku zvrškom obuvi z prírod-ných usní alebo z poromérov následovně technologie. Na zdrsněné napínacie záložky zvrškovobuvi sa robia dva samostatné nánosy polyuretanovým lepídlom o sušině 18 percent, do ktoréhosa přidává 8 percent izokyanátového sietovacieho prostriedku. Doba schnutia medzi prvým a dru-hým nánosem je 10 až 20 minut. Na podošvy sa potom robí jeden nános toho istého lepidla ako nazdrsnenú napínaciu záložku. Táto technológia viaže značné množstvo pracovných sil, nakolkonanášanie lepidla sa musí robit ručně s použitím štetea, čo napokom vplýva na vysoká spotřebutohoto lepidla.As is known, in the footwear industry currently used to bond polyurethane, polyvinylchloride and thermoplastic rubber footwear to natural leather uppers or poromers is the following technology. The roughened tensioning tabs of the upper shoe make two separate coatings with a polyurethane adhesive of 18 percent, to which 8 percent of the isocyanate crosslinker is added. The drying time between the first and second coatings is 10 to 20 minutes. The sole is then coated with the same adhesive as the rubbed tensioning tab. This technology binds a significant amount of workforce, the coating of the adhesive must be done manually using a brush, which in turn affects the high consumption of this adhesive.

Okrem spomenutej technologie, pracujúcej s dvojzložkovým polyuretanovým lepídlom, tedas takým, ktoré obsahuje prídavok siefujúceho izokyanátového prostriedku, sa používajú techno-logie, pri ktorých sa prvý nános na zdrsnenú napínaciu záložku obuvi robí jednozložkovýmpolyuretanovým lepídlom so sušinou polyuretanového kaučuku 10 alebo 20 percent. Druhý nánosnapokon tvoří dvojzložkové polyuretanové lepidlo s obsahom sušiny 18 percent a s prídavkom8 percent síetovacieho prostriedku, nános ktorého sa robí taktíež na podošvy. U zlepovaniaza použitia lepidla o desatpercentnom obsahu polyuretanov nie je kvalita vo všetkých prípadochvyhovujúca, najmá ak pojde o riedke zvrškové usne so značným podielom medzivlákenného priesto-ru. V tomto případe je podstatné lepšia situácía v případe používania jednozložkového poly-uretanového lepidla pre prvý nános na zdrsnenú napínaciu záložku, no i tak hrá nepriaznivúúlohu skutočnost, že sa nánosy dvojzložkového polyuretanového lepidla robia ručně štetcom,čo sa prejaví rovnakýrai nevýhodami, tedá značnou spotřebou lepidiel a náročnostou na pracovněsily.In addition to the aforementioned two-component polyurethane glue technology, Tedas, which contains the addition of a crosslinking isocyanate composition, techniques are used in which a first coat on a roughened stretch bookmark makes a single component polyurethane adhesive with a polyurethane rubber dryness of 10 or 20 percent. The second layer consists of a two-component polyurethane adhesive with a solids content of 18 percent and an addition of 8 percent of the cross-linking agent, so that the soles are so stiff. In improving the use of a 10% polyurethane adhesive, the quality is not always satisfactory in all cases, especially when it comes to thin upper leather with a high proportion of inter-fiber space. In this case, a better situation when using a single-component polyurethane adhesive for the first coat on a roughened stretch bookmark is essential, but the fact that two-component polyurethane adhesive deposits are made by a brush, which has the same drawbacks, is a considerable consumption of adhesives. and labor intensity.

Ak by sa použilo lepidlo so sušinou 22 hmotnostných percent, obsahujúce 10 dielov tetra-izokyanátového sietovacieho prostriedku, napr. podlá CSP 168 520, bolo by opat nutné robitako na napínaciu záložku, tak í na podošvu dva nánosy, čo má za následok vysokú spotřebu le-pidla a tým zbytočné predražovanie zlepovania.If a 22 weight percent adhesive containing 10 parts of the tetra-isocyanate crosslinker, e.g., according to CSP 168,520, would be used, two coatings would have to be applied to the tensioning tab and to the sole, resulting in high consumption of le -pouls and thereby unnecessary overpricing of gluing.

Spomenuté nevýhody sa odstraňujú, kecf sa pri zlepovaní podošiev zo syntetických •'materiá-lov, ako je polyuretan, polyvinylchlorid a termoplastický kaučuk, ku zvrškom obuvi z prírodnýchalebo póromerických usní, za použitia nánosov lepidiel na báze roztokov lineárnych polyéster-uretanov s případným prídavkom sietovacích prostriedkov vo formě tri/-p-izokyanátfenylesteru/kyseliny tiofosforečnej alebo polyfenylénpolymetylénizokyanátu postupuje zposobom podlá vyná-lezu, podstata ktorého spočívá v tom, že sa na zdrsnenú napínaciu záložku zvršku obuvi naná-ša iba jeden nános lineárneho polyesteruretanového lepidla s obsahom sušiny 22 až 24 hmot-nostných percent a na podošvu tiež jeden nános 18 až 20 percentného roztoku'polyesteruretano-vého elastoméru, pričom prídavok izokyanátového sietovacieho prostriedku, ktorý sa přednostněpřidává do lepidla pre nános na podošvu, nepřekračuje spolu 16 až 18 hmotnostných percent.Alternativně sa zlepovanie sposobom podlá vynálezu robí tak, že sa celkové 16- až 18percentnémnožstvo přídavku izokyanátového sietovacieho prostriedku rozděluje na dva podiely přidávanédo jednotlivých lepidiel a sice tak, že sa nános na napínaciu záložku zvršku obuvi uskutočňujepolyesteruretanovým lepídlom o obsahu sušiny 22 až 24 hmotnostných percent, do ktorého bolovopred přidaných 8 až 12 hmotnostných percent izokyanátového sietovacieho prostriedku, pričomna podošvu· sa nanáša 18- az ZGpercentné polyesteruretanové lepidlo, ktorého obsah izokyaná-tového sietovacieho prostriedku je 8 až 10 hmotnostných percent. Výhodou sposobu podlá vynálezu je, že dochádza k úspoře pracovných sil pri samotnora na-nášaní a k úspoře použitého lepidla na zdrsněné napínacie záložky zvrškov obuvi, nakolko vhod-ná kombinácia koncentrácie polyesteruretanového kaučuku v lepidlách umožňuje nanášaů naThese drawbacks are avoided when bonding the soles of synthetic materials, such as polyurethane, polyvinyl chloride and thermoplastic rubber, to the shoes of natural or porous leather, using adhesives based on linear polyether urethane solutions with optional crosslinking added. The process according to the invention is characterized in that only one coating of linear polyesterurethane adhesive with a dry matter content of 22 to 24 is applied to the roughened tensioning tab of the shoe upper. the percentages of the polyesterurethane elastomer are 18 to 20 percent by weight, and the addition of an isocyanate crosslinking agent, which is preferably added to the sole adhesive, does not exceed a total of 16 to 18 percent by weight. Alternatively, the method according to the invention is adhered to in such a way that the total 16 to 18 percent by weight of the isocyanate crosslinker is divided into two portions added to the individual adhesives, such that the deposition on the shoe side of the shoe is performed with a polyester ester polyurethane adhesive of 22-24 weight percent, to which 8 to 12 percent by weight of the isocyanate crosslinking agent has been added, wherein the sole is deposited with 18 percent by weight of a polyester urethane adhesive having an isocyanate crosslinking agent content of 8 to 10 percent by weight. An advantage of the process according to the invention is that there is a saving of workforce in self-loading and in saving the used adhesive on the roughened tensioning tabs of the shoe upper, as a suitable combination of the polyesterurethane rubber concentration in the adhesives allows

Claims

209777 2 a roughened napkin tab of the shoe upper only one coat of a 22 to 24 percent solution of linear polyester urethane adhesive. The strength of the joints is very good, practically the same as in the prior art, with the bonding temperature being good up to 70 ° C, as is the case according to the first definition point and up to 95 ° C. in an alternative method according to the second point of the definition of the invention. In addition, it is possible to use a machine for the application of a two-component polyurethane adhesive to the roughened tensioning tabs of the shoe, which facilitates the work and has a favorable effect on the economical aspect of the invention. Briefly, the method according to the invention can be described in the following when gluing the soles to the upper parts. One coat of polyurethane resin with a content of 22 to 24 percent by weight of polyurethane rubber dissolved in a mixture of toluene or acetone with gasoline is used to make the roughened tab of the shoe upper. The sole is also provided with a single layer of a two-component polyurethane adhesive containing 18 to 20 percent by weight of polyurethane rubber, in this case containing 16 to 18 percent of the isocyanate crosslinking agent. In other cases, the roughened tensioning tab of the upper of the shoe is made according to the invention by a one-to-one adhesive of 22 to 24 weight percent polyurethane rubber, which is twin-component, with the addition of 8 to 12 percent isocyanate crosslinking agent. a polyurethane adhesive containing from 18 to 20 percent by weight of polyurethane rubber, the addition of an isocyanate crosslinking agent being reduced to 8 to 10 percent. As already mentioned, both alternatives can be done manually by brush, but in both cases it is possible to use machinery, which depends on the specific tasks solved in the operating conditions of the production of the individual types of shoes. the quality of the joints, their temperature stability, labor saving and glue saving. SUBJECT OF THE INVENTION

A method of gluing synthetic material soles, such as polyurethane, polyvinyl chloride and thermoplastic rubber, to natural or porous leather footwear, using linear polyesterurethane based adhesives with optional addition of crosslinking agents in the form of three / five isocyanate phenylether / thiophosphoric acid or polyphenylene polymethylene isocyanate, characterized in that only one coating of linear polyesterurethane adhesive with a dry matter content of 22-24% by weight is applied to the roughened shoe upper layer and a single layer of 18-20% of the acetylate polyurethane elastomer is also applied to the sole; the crosslinking agent, which is preferably added to the adhesive for application to the sole, does not exceed a total of 16 to 18 weight percent. *

2. Process according to claim 1, characterized in that the total 16- to 10% amount of isocyanate crosslinking agent additive is divided into two portions added to the individual adhesives such that the polyesteruret & From 22 to 24 weight percent, to which 8 to 12 weight percent isocyanate crosslinking agent has been previously added, with an 18 to 20 percent polyester ester urethane adhesive having an isocyanate crosslinking agent content of 8 to 10 weight percent on the sanana sole. Swroprafia. n. p vod rJvod 7. Moet