FR2487179A1 - METHOD FOR MOUNTING SHOES WITH FUSE GLUE AND SHOE MOUNTED BY THIS PROCESS - Google Patents

Abstract

MOUNTING PROCESS FOR SHOES WITH FUSIBLE GLUE AND SHOES MOUNTED BY THIS PROCEDURE. THE PROCESS USES A SELECTED FUSE ADHESIVE, INCLUDING A MINOR PROPORTION OF A LINEAR ALIPHATIC HYDROCARBIDE POLYMER AT HIGH MOLECULAR WEIGHT AND A MAJOR PROPORTION OF A SENSITIVELY LINEAR COPOLYESTER OF WHICH THE CHAIN OF ALIPHATIC ALIPHATIC HYDROCARBON CONTAINING A HIGH MOLECULAR WEIGHT 'TEREPHTHALIC ACID AND ONE OR MORE ALIPHATIC OR AROMATIC DICARBOXYLIC ACIDS, INCLUDING ONE DICARBOXYLIC ACID HAVING AN ALIPHATIC CHAIN OF AT LEAST 5 CARBON ATOMS. THE PROCESS IS APPLIED IN PARTICULAR TO THE MOUNTING OF THE SIDES OF A SHOE USING A MACHINE INTENDED TO PROGRESSIVELY MOUNTING THESE SIDES BY APPLYING MOUNTING WHEELS AND USING A FUSE GLUE CONTAINING A POLYETHYLENE (MELTING INDEX INCLUDED PREFERREDLY) BETWEEN 5 AND 200) AND A COPOLYESTER CONTAINING PATTERNS DERIVED FROM BUTANE-DIOL, DIMERIZED FATTY ACID, TEREPHTHALIC ACID AND ISOPHTHALIC ACID IN SELECTED PROPORTIONS.

Description

The present invention relates to improvements

  footwear with fusible glues.

  The word "shoe", when used in the

  this memorandum covers both footwear in general

  ral and the item being manufactured. Various glues have been proposed for use in mounting the shoe stems. During the mounting operation, a shoe shank is pulled so that it fits the curve of a mounting shape. The margins of the stem are folded or pulled across the bottom of the shoe and are fixed to a first placed on

  the form. Usually, the editing operation is carried out

  killed using machines to treat the tip,

  the sides and the back of the shoe or

  born of the latter. It is necessary to fix these

  at the first, so that when the tipping tools are removed, the shank margins remain

their folded position.

  Modern machines mounted to be used to mount the end, sides and back of shoes are designed to work quickly

  and require that the glues used be applied easily

  and that they harden sufficiently to retain

  the turning margins, even if the beater tools stay in their inward folding position for only about two seconds or do not stay at all. Also, some manufacturing operations carried out after assembly are performed at

  high temperatures and, therefore, it is essential

  that the glues used for the assembly can be

  at temperatures above 100 ° C so that the boot can remain in the assembled state. For example, it may be necessary for side-mounting glues to have softening points greater than 120 ° C, more often between 150 ° and 2100 ° C and often in the range of about 1700 to 2000 ° C. These and other conditions impose limitations on the time after which the glue must provide a bond and on the required flexibility and heat resistance. Similarly, the adhesion characteristics must be such

  that the materials used for the manufacture of

  they are properly stuck; the most commonly used materials for the manufacture of footwear include leather and polyvinyl chloride-based rod materials and materials for the former, for example a latex-bound fibrous web, for example "Texan" ( trademark). Other materials proposed for the manufacture of shoes and which are desirable to adhere include polyvinyl chloride and skin-like lining materials. Skin-like liner materials include synthetic materials including an inner fabric layer, for example a polyamide fabric and a foam layer, for example polyurethane, and they are relatively difficult to mount using

  machines in which the beater tools do not

  not in their drawdown position, in particular

  during the manufacture of women's shoes.

  Modern assembly machines for use with fusible adhesives are provided with means for containing and melting fusible materials in various forms, for example fusible materials.

  distributed in the form of flexible rods or granules.

  In the case of rod-shaped fusible adhesives, additional conditions are imposed on the adhesive in order to be able to distribute it in the form of a windable flexible rod that can be unwound from a coil and introduced into the assembly machine by a machine. advance device of

the latter.

  Polyamide-based fusible glues are commonly used for side-mounting operations, but are much more expensive than polyester-based fusible materials commonly used for

end mounting operations.

  It is known that butanediol terephthalate copolyesters are commercially acceptable melt mount fusible glue compositions. These materials tend to harden rapidly from the moving liquid state

  hard solid state in a relative temperature range

  in a significant degree, a sticky state at or near its melting point. Also, for the

  glue shows great adhesion strength, it is neces-

  to use relatively highly viscous materials which tend to make it more difficult to extrude the glue on the boot during assembly. As a result, although these materials can be formulated in such a way that they are acceptable for mounting the tip and the back,

  they tend to be less favorable for opera-

  mounting procedures in which the instruments of

  assembly do not remain for a long time to

  the margins of the stem against the first, while

  the glue hardens between them, and for the operations of

  in which it is desirable to be able to glue various materials, while ensuring the tenacity of the gluing

  and using the glue in the form of a stable rod.

  The present invention particularly relates to an improved method of assembly using a composition

  improved fusible mounting adhesive.

  The Applicant has discovered that it is possible to obtain a satisfactory mounting of the shoe sides by using selected fusible glue compositions.

  including some polyesters and some polymers of hydro-

  linear aliphatic carbides with high molecular weight.

  The Applicant has observed that these selected glue compositions can be extruded in the form of rods having suitable viscosities and that they exhibit satisfactory adhesion to various materials,

  especially the lining materials of the polychloride type

  vinyl that is not easy to mount on the sides using known fuse glues using a machine with progressive operation for mounting the sides. Adhesive compositions for use in a process according to the invention have a low ability to give

- 2487179

4-

  for high viscosities and an interesting degree of crystal

  as well as tack and cohesion properties over a range of temperatures at or near the melting point, i.e. less hardening, referred to herein as after their gooey nature. The present invention provides, in one of its various aspects, in a method of mounting a shoe in which the edges of the rod are attached to the first

  by a glue composition, the use of fused glue

  comprising a minor amount of a hydrocarbon polymer

  high molecular weight aliphatic linear bins and a

  of a substantially linear copolyester having a molecular chain consisting of units corresponding to diol units and acidic units derived from: (a) one or more aliphatic diols (b) terephthalic acid, to a extent not less than 60 moles per 100 moles of the acid-type units and

  (c) one or more aliphatic dicarboxylic acids

  or aromatic, comprising a dicarboxylic acid having a difunctional aliphatic hydrocarbon residue having not less than 5 carbon atoms in the chain of the molecule, the units being chosen so that the adhesive composition has a softening point ( ball method

  and the ring) lying between 1201C and 2101C.

  Suitable glue compositions have melting points (ball and ring) lying in a

  wide range of temperatures according to the conditions of

  and the materials to be assembled. The compositions of which

  melting point exceeds 2100C are not suitable for

  vir in the current editing machines. If composites

  whose melting point is as low as 120'C may be acceptable in some cases for use with

  side-mounted machines intended to operate automatically

  to simultaneously and progressively mount both sides of a shoe using mounting knobs during the relative movement between the mounting wheels and the shoe in the lengthwise direction thereof (so-called here as "progressive assembly machines"), for example using a thumbwheel for rubbing and squeezing opposing side-seam margins on which glue composition has been applied in a single pass along the shoe , the Applicant prefers to use glue compositions whose softening point (ball and ring) is between 170.degree.

  2000C. The glue compositions may have a viscosity

  within a wide range, and the Claimant

  use compositions which when manufactured have a viscosity of between about 500 and 1500 ps at 2400 ° C., as determined from the viscosity measurements made in a "Brookfield Thermocell" device; of the

  compositions having a viscosity of less than 500

  to present an inadequate power of restraint for the

  certain rigid materials for the manufacture of

  When used in progressive assembly machines, materials with a viscosity of more than 1500 poises tend to be rather difficult to extrude during assembly. When using a progressive editing machine for

  the implementation of a method according to the invention, the

  deresse prefers to use a glue composition whose viscosity is, at the moment of its manufacture, between 900

and 1100 Po at 2401C.

  The aliphatic diols to be used for preparing the polyester preferably include saturated aliphatic diols of the formula HO (CH 2) n OH wherein n is an even number, and especially 1,4-butanediol. The diol components may also comprise a small proportion of a long-chain glycol, for example a glycol whose

  molecular weight is between 1000 and 10000, provided that

  that the resulting copolyester has a certain

  finite for the hydrocarbon polymer. If you wish,

  the aliphatic diol may comprise one or more diols

  Feeling methyl or ethyl substituents on their chain

  molecular. We can. also use other food diols

Z48'7179

  short-chain pheromones, for example ethylene glycol, 1,6-hexanediol and mixtures thereof, but we generally prefer that the proportion of 1,4-butanediol used is at least 50 moles % of the diol type units, to obtain desirable qualities of adhesion.

ence and crystallinity.

  To obtain the softening point and the crys-

  tallness of necessary compositions, the Applicant uses

  copolyesters comprising not only im-

  patterned terephthalate but also quantities

  significant quantities of units from another dicarboxylic acid

  than. Incorporation of units from other acids and / or diols into the molecular chain affects various properties of the polyester, which includes not only the softening point but also, for example, adhesion,

  the crystallinity, viscosity and flexibility of the composi-

  tion. Due to the molecular structure of terephthalic acid

  phthalic, which may be considered to have carboxyl groups attached in opposite positions on a benzene ring, the presence of terephthalic acid residues

  in the polyester molecule tends to increase the crystalli-

  sability of it. Incorporation of patterns from

  aromatic acids, for example ortho- and iso-

  phthalic, particularly affects the melting point and crystallizability of the polyester. The Applicant prefers to incorporate units derived from isophthalic acid. It is important that the aliphatic moieties of the copolyester molecule exhibit affinity for the high molecular weight linear hydrocarbon polymer used, as this influences to a marked degree the sticky nature of the composition and its viscosity. For example, aliphatic dicarboxylic acids having less than 5 carbon atoms in the molecular chain tend to give poor bonds when mounting the sides. Motifs

  Suitable aliphatics can be derived from dicarboxylic acids

  aliphatic acids containing not less than 5 atoms of

  carbon in their aliphatic hydrocarbon residue difunction-

Z487'179

  which includes acids called dimers and acids

  having from 6 to 12 carbon atoms in the hydrocarbon residue

  bure, such as, for example, dodecanoic acid, azelaic acid, sebacic acid and mixtures thereof. When present in the molecule with the units of phthalic acid, the units of sebacic acid, azelaic acid and other dibasic aliphatic acids have the effect of removing the benzene rings from the chain. polymer

  and impart flexibility to the polymer chain. This spread

  It seems important about the necessary compatibility with the aliphatic hydrocarbon polymer. The Applicant prefers to incorporate units derived from a fatty acid

  dimerized derived from an oil. A dimerized fatty acid from

  an oil can be obtained by polymerizing a polyunsaturated acid derived from a vegetable oil, for example linoleic acid from soybean, cottonseed or flaxseed oils, by the process described in US Pat.

  U.S. Patent No. 2,482,761, according to

  the acid derived from an oil is heated in the presence of water by applying sufficient pressure to prevent

  a decomposition. The dimerized fatty acid thus produced

  has an apparent molecular weight of about 600

  equivalent of about 300 and usually

  95% of molecules comprising 36 carbon atoms and having two carboxyl groups, the remainder comprising a little monomeric acid and a few trimeric molecules comprising

  54 carbon atoms and having 3 carboxyl groups. The-

  wanderer prefers to use a dimerized fatty acid, deriving

  an oil, in which the proportion of monomer is less than

  less than 1% and that of trimers less than 6 o. How-

  In this case, a dimerized fatty acid comprising up to

  than 25 trimer. It is also possible to use a hydrogenation product of a dimerized fatty acid derived from an oil. The Applicant prefers to use a polyester whose diol units come from 1,4-butanediol and the acid units come from terephthalic acid, isophthalic acid and a dimerized fatty acid derived from an oil. Preferably, the polyester comprises 2 to 20 mole% dimerized fatty acid units and 98 to 80 mole% O units of a mixture of terephthalic and isophthalic acids, more preferably not more than about 5 moles of dimerized fatty acid patterns and no less than about

  moles of the terephthalic acid and isoacidic acid units

  phthalic. The Applicant also prefers terephthalic acid units. and isophthalic acid- constitute 60 to 90 mole A acidic units and 8 to 38 mole% acidic units, respectively, still better, the Applicant prefers the presence of 70 to 80 mole% D acidic units

  terephthalic acid and from 15 to 25 mole% A of isoacidic acid

  phthalic. As will be understood by those skilled in the art, the patterns

  Polyester acids can come not only directly

  acids themselves, but also their lower esters.

  (eg methyl or ethyl esters),

  when it is necessary or convenient to operate in this way.

  The presence of aliphatic residues in the copoly-

  ester, especially those derived from a dimer acid,

  to include in the glue

  of the linear aliphatic hydrocarbon polymer to

  high molecular weight. These polymers tend to be incompatible

  with the polyesters more commonly used in fast setting, fusible adhesives having polyesters for mounting the tips, while with the selected copolyesters incorporated in the adhesive compositions for use in the present invention, it is possible to include 20% by weight of the polymer, or even more, without encountering, when used with progressive assembly machines, problems due to poorer extrudability and lack of retaining power that can be associated with

  incompatibility. Polymers of aliphatic hydrocarbons

  suitable linear high molecular weight ticks

  polyolefins, especially homopolymers of ethylene; Low density polyethylenes are preferred, especially those having a melt index of from about 200 to about 200, which amounts to a molecular weight of from about 30,000 to about 90,000, and their mixtures. By melt index is meant the weight, in grams, of the extruded material through a standardized die, in 10 minutes at 190 ° C; this expression

  is defined in British Standard BS2782 Method 105C.

  Polymers with a melting index of

between 5 and 30.

  Preferred polyethylenes are provided in the United Kingdom under the trademark "Alkathene" by the Plastics Division of ICI. The grades 17 (melt index 7), 19 (melt index 20) and 23 (melt index 200) have all been satisfactory and the higher molecular weight grade "Alkathene 17" is preferred. These materials can conveniently be used

  of a colored masterbatch during the manufacture of the

glue position.

  The presence of an aliphatic hydrocarbon polymer

  than linear high molecular weight in a composition

  glue suitable for use in a process according to

  This leads to adhesives exhibiting sticky cohesive nature in a temperature range of several degrees at or near the softening point of glues. This cohesive and sticky nature is advantageous in side-mounting operations in which the

  margin of sticking is held firmly on the first,

  in a short time only, by the mounting tools of the machine to mount. The use of such glue compositions makes it possible to keep the materials in the mounted position, although, immediately after a progressive application of the fuse adhesive composition on the mounting margins, these are simply pulled in position and momentarily pressed against the first by the mounting knobs during the relative movement between the mounting knobs and the shoe in the longitudinal direction of

  it. In addition to its influence on the physical properties

  That is, the "sticky nature" of the glue composition at or near its melting point, the high molecular weight linear aliphatic hydrocarbon polymer

  molecular influence also affects the adhesion

  the composition of glue and seems to amplify

  gluing, in the assembly process, various materials for the manufacture of shoes, which includes, for example, liners polyvinyl chloride. Similarly, these glue compositions can be extruded into rods without excessive difficulty to give

  constantly chopsticks of uniform section. If quantities

  As important components of the polymer can be incorporated into the glue composition, an optimum blend of properties can be achieved by using from 2 to 10% by weight of the high molecular weight linear aliphatic hydrocarbon polymer based on the weight of the glue; proportions greater than about 20% by weight tend to give more extrusion

  mediocre when used at the required temperatures.

  The glue compositions of the invention can

  be formulated to include additives normally

  used in fusible adhesives for mounting, by

  Examples of dyes, fillers, resins and stabilizers

  lisants. A method according to the invention is advantageous for mounting both sides of a shoe in a machine for progressively mounting the sides with the help of mounting wheels during the relative movement of the wheels.

  shoe along it, for example a machine

  does automatic to mount the sides, sold in the UK by The United Kingdom Shoe Manufacturers Company Limited (BUAL NO. 2). In a method according to the invention, the

  The end of the shoe can be mounted using a

  fusible glue based on, for example, a copolyester

  terephthalic acid, isophthalic acid, an acyl

  of aliphatic and a diol consisting of 1,4-butanediol

  or including it. This mounting of the tip can be realized

  before mounting the sides, as indicated above. Preferably, the mounting of the shoe is completed by mounting the casing with another adhesive glue or with seeds. In order for the invention to become clearer,

  Seventeen fused glue compositions will now be described.

  a487179 ble and their use for mounting the sides. Among these compositions, the number of glue compositions

  2-7, 10, 11, 12, 14-17 for a description intended to

  illustrate the invention. It goes without saying that these examples of glue

  were chosen for the description, with a view to facilitating the

  understanding of the invention and not to limit it.

  Polyesters (A to F) are prepared by the controlled reaction of the ingredients to produce copolyesters having acid units and diol units according to

  the molar proportions given in Table I, and

  both the viscosity and softening point values given in Table I. The viscosity values given in the tables are determined using viscosity measurements made in a "Brookfield Thermocell" device. Polyesters A, E and F by a controlled reaction of a material charge by operating as follows. 236 g of a dimerized, viscous, liquid linoleic acid having an apparent molecular weight of about 575 and comprising about 95% dimer, 40% trimer and 1% monomer ("Empol 1014", obtained from Unilever Emery) with 1070 g of terephthalic acid and 270 g of isophthalic acid. This mixture is reacted with 0.94 l of 1,4-butanediol in the presence of 4.5 g of dibutyltin oxide. The water and the diol are boiled off and, in the final stages of the reaction, the reaction is carried out under vacuum. Heating is continued and the temperature is raised to about 240 ° C., in order to carry out the polymerization of the polyester in the container until

  the polyester has the required viscosity.

  After the production of the polyesters, various adhesive compositions are prepared by way of example using

  the weight quantities of material indicated in Table II.

  The values of the viscosity and the softening point of the compositions are also indicated in Table II. The resulting glues are extruded into a 4 mm diameter rod for use.

like fusible glues.

  In these compositions, the aliphatic polymer

  used in each case is an aliphatic hydrocarbon polymer

  A high molecular weight linear tick having a melt index of from 5 to 200. The hydrocarbon polymer of the "N 1 Aliphatic Polymer Composition" is "Alkathene 17", a low density polyethylene having a melt index of 7, and a density of 0.917 g / cm3. The material is added to the polyester in the form of "Masterbatch White 005" comprising 70% by weight of "Alkathene 17" and 30% by weight of titanium dioxide (anatase). Thus, the quantities of "Alkathene 17" that are used in glues

  numbers 2, 3, 13, 14 and 17 represent 70% of the values

  listed in Table II, namely 5.8; 9.6; 3.5; 3,5 and

2.8, respectively.

  The "N 2 aliphatic polymer composition" is "Alkathene 17" itself; "N 3 aliphatic polymer composition" is "WJVG23", low density polyethylene having a melt index of 200 and a density of 0.914 g / cm 3; the "NI 4 aliphatic polymer composition" is "Masterbatch 0729 green 6420" comprising 62.5% by weight

  "Alkathene 19", 15% titanium dioxide, 10% car-

  calcium bonate and green and yellow organic pigments.

  Thus, "Alkathene 19" constitutes the hydrocarbon polymer

  of this composition (melt index: 20;

  that: 0.916 g / cm 3) and is present at 2.48 o

weight of the composition N 15.

  The "N 5 aliphatic polymer composition" is "Masterbatch 0120 Brown 509" comprising 78% by weight of "Alkathene 17" and a mixture of iron oxide (20%),

  titanium dioxide (rutile) and carbon black. The proportion

  of the hydrocarbon polymer that is used is therefore

  of 3.12% of the weight of the composition N 16.

  Example 1: Mounting Process A man's shoe is mounted on a low shoe shape as follows. On a form, with a first in "Texon", is assembled a stem comprising a white outer skin of vegetable tanned leather, and reinforcements front and rear. The assembly is presented to the processing tools of a machine "BUS ™ N0 4A" to shape and assemble the ends, in particular to mount the front parts of the rod. In this operation, a fusible glue composition, substantially corresponding to the polyester formulation C, is applied to the former at a temperature of 2400 ° C in a horseshoe configuration before folding the mounting margin inwards. After mounting the tip, the shoe is presented to a machine "BUAL NI 2" for the

  simultaneous assembly of both sides of the rod. NO 16 glue composition is sent by a source from this col-

  the, in the form of a rod wound in a coil. (4 mm diameter rod) to a machine fusion device and is then applied to the shoe, approximately

  22tJC, by nozzles arranged on each side of the shoe.

  safe. During this operation, it occurs between the knurls

  the machine and the shoe a relative movement in the direction of the length of the shoe, and the nozzles are guided along the shoe towards the rear of it to gradually deposit a bead of fuse glue along on each side of the shoe, between the mounting margin of the rod and the first, in front of the wheels. As the glue beads are applied, the knobs process the mounting margin of the rod so as to progressively rub the mounting margin

  on the first and to press against it for deform-

  sea the glue rolls between the margin and the first

  and apply a bonding pressure to the mounting margin.

  This side mounting operation is completed in a few

  seconds and, therefore, the period during which the pres-

  Linkage is applied to the mounting margin at any particular point is minimal. After the mounting of the sides, the shoe is presented to a machine "BUSMC NO 5" assembly of the interlocking to seed the last parts of the casing of the shoe. We find on the exam that the shoe mounted is very tight fitting, with a line of squares of very clear shape and firm bonding

  all along the mounting margin on the first.

  Example 2 Comparison of Bonding Suitability of Composites

selected formulations of glue a487179

  In a machine "BUAL N0 2" the

  glue positions NO 15, NO 16 and NO 17 to mount the sides of simulated shoe stems on first,

  using samples of various materials to

  bric the shoe and the first in "Texon". By way of comparison, in the same way, it is also used, for mounting the simulated shoe sides, a polyamide-based fuse glue for assembly, sold in the United Kingdom under the designation "HM 522" by the British United Shoe.

  Machinery Co. Ltd. The collages thus produced are evaluated.

  To manufacture the simulated shoes, Texon raw material and pieces of rod material of configuration and size are used to simulate each whole side of a shoe from the front part to the casing. The mounting of the sides of the shoe stems simulates the type for low shoes, corresponding to

  men's shoes and the type for arched shoes cor-

  corresponding to women's high-heeled shoes. The parts of the stem are attached to the back and the opening of the neckline, and the front and rear extreme parts are seeded to the first on the shape. This assembly is then presented to the machine as if it were a

  rod and boot first assembled on a form.

  The machine is operated so that it applies progressively

  At approximately 220 ° C, the fuse glue chosen between the first and the mounting margin of the rod and that it folds the marginal parts of the rod on the first and rubs them by pressing them towards the rod to achieve the

mounting as described above.

  It is considered that the quality of the mounted parts is poor, poor, fair, good or excellent depending on their appearance and resistance to manual deformation and the failure of the collages along the mounted portion. Samples rated as poor or poor are considered unacceptable for the manufacture of

  while those rated as fair are

  considered acceptable for the manufacture of shoes and those rated as good or excellent are considered even more acceptable. The results obtained are shown in Table III. It can be seen from Table III that during the

  tests carried out with leather rods, the results obtained

  in the case of the use of the composition of adhesive Nu 16 are comparable to those obtained in the case of the use of glue "HM 522", while the results obtained during tests on Other shoe-making materials are significantly better than those obtained with

  "HM 522". This appears especially in the case of stems

  polyvinyl chloride liners, but this is also evident in the case of gluing with "Porvair" black (registered trademark), a blue polyvinyl chloride stem and a cloth-stem reinforcement, and with white leather to vegetable tanning. The results also indicate that

  glue compositions NO 15 and 17 behave

  blable to the NI 16 glue composition.

  EXAMPLE 3 Variation of the Polyester and the Polymer Glue compositions 1 to 14 are used to mount the sides of simulated shoe stems, operating as described in Example 2 and using

  forms for low shoes. We find that the composition

  NO 1 is not able to stick a "skin-conforming" liner material to "Texon" raw materials, while the N0s2, 3, 4, 5 and 6 compositions are able to adhere this material, although we note a lack of adhesion strength

  in the lining marrying the skin. We find that the composition

NO 7 is a good glue for mounting the sides, while the composition No. 8 gives a brittle stick and is considered lacking adequate retaining power for mounting the sides. The glue composition N0 9 is unable to hold heavy leather or stems of skin-conforming material. However, we obtain on these materials collages of fair resistance with the compositions of

  NI 10 and NI 12 and, to a lesser extent, the composi-

  The glue composition NI It is different

  to be treated in the machine and the temperature of application of the glue is reduced to a value between 2000C and 2150C to achieve a balance between the speed

Z48 7 179

  glue flow (which is low at 2000C) and the

  see restraint (which decreases above 2151C). We find

  that the adhesive composition NO 13 gives an inapplicable adhesion

  adequate to the material of the first and a poor holding power. The composition NI 14 is used at a glue application temperature of 205 ° to 210 ° C., and it is found to give an acceptable mounting of leather, "Porvair", chloride

  polyvinyl, skin-friendly material, poly-

  urethane and heavy leather on premieres in "Texon".

  The examples above show that

  glue positions NOS 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 16 and 17 allow the proper mounting of the sides of various rod materials in a machine intended to progressively mount both sides of a shoe simultaneously with the aid of mounting wheels during relative movement

  between the wheels and the shoe, in the sense of

  this one. All of these compositions comprise a minor proportion of a high molecular weight linear aliphatic hydrocarbon polymer and a major proportion

  a substantially linear copolyester whose molecular chain

  the ring consists of units corresponding to diol units and acidic units from (a) one or more aliphatic diols; (b) terephthalic acid to not less than 60 moles per 100 moles of acidic units; and (c) one or more dicarboxylic acids

  aliphatic or aromatic compounds, comprising a dicarboxylic acid

  that having a difunctional aliphatic hydrocarbon residue having not less than 5 carbon atoms in the chain

  the motifs being chosen so that the composition

  glue has a softening point (method

  of the ball and the ring) being between 1200 and 2101C.

  Examples show that better behavior is achieved over a range of materials under test conditions when using copolyesters

  containing units derived from a dimer acid in

  glue positions at 2400C a viscosity of about 900 to 1100 poises. If certain compositions comprising f487179 copolyester having units derived from sebacic acid

  (dicarboxylic acid having a hydrocarbon chain

  8 carbon atoms) are satisfactory, their behavior does not seem to be as good as that of the compositions comprising dimer acid to constitute

  the aliphatic dicarboxylic acid units.

  On the contrary, it is found that the adhesive compositions Nos. 1, 8, 9 and 13 are inadequate for mounting the sides in these tests. It is noted that the Ncs glue compositions 1 and 9 do not contain linear high molecular weight aliphatic hydrocarbon polymer, while the NOs 8 and 13 glue compositions comprise the copolyesters.

  O and C, respectively. Table I shows that the copo-

  O-ester does not contain units derived from an aliphatic acid. Copolyester C contains units derived from adipic acid (dicarboxylic acid having an aliphatic hydrocarbon chain having four carbon atoms) and polypropylene glycol, neither of which should be considered as being clearly

  compatible with the linear aliphatic hydrocarbon polymer

area.

TABLE I

Polyester Formulations -

moles' O

A B C D E F

  Acidic units derived from Terephthalic acid 76 67.5 76.2 85.8 76 76 Isophthalic acid 19 22.6 17.0 14.2 19 19 Dimer acid 5 - - - 5 5 Sebacic acid - 9.9 - - - _

Adipic acid - - 6.8 - -

  Diol patterns derived from Butanediol 100 100 98.8 100 100 100 Polypropylene glycol (molecular weight

2000) - - 1,2 - - -

  Viscosity at 240 C (Po) 980 320 250 300 600 900

No softening point

  (QC) (ball and ring) 190 174 190 205 190 190

TABLE II

  Ingredients 1 Glue Compositions

6

11 12

14 15

  Polyester A 100 91.63 86.3 95.3 90.1 95.2 90.1 I Polyester B 100 90 75 90 Polyester C ___ __95.0 Polyester D 90.1 __ Polyester E 195 Polyester F 95 96 96 Composition aliphatic polymer

N 01 8.37 13.7 5.0 5 4.0

N 2 4.7 9.9 9.9 9.9 10

N 3 4.8 -10 25 -

N cl 4 4.0 _

N 5 4.0

  Viscosity at 240 C (in) 980 1085 1170 1060 1260 985 980 300 320 350 725 380 250 600 1000 102 1075

Point of absence

  softening 191 191 191 191 191 191 191 205 174 176 178 173 190 190 19] 19 191 (OC, ball and ring) "o on% o

TABLE III

  Adhesive Type of "FIM522" NI 15 NO 16 NO. 17 mount "Porvair" black passable excellent excellent Full leather corked chrome, 2.5 mm flat * passable passable passable Full chrome cleared leather, 2.5 mm flat * passable passable passable Rod with flat black polyvinyl chloride liner * bad good good good Flat brown grained polyvinyl chloride lining * bad good Blue polyvinyl chloride upper with high fabric reinforcement ** passable good good good White vegetable tanned leather * good excellent * flat: low shoe model for men

  ** top: high-heeled camber shoe style for women.

we laughed this ho

Claims (11)

  1. Method of mounting a shoe, according to   which one fixes the margins of a shoe stem to a first   using a glue composition, characterized in that a fusible glue comprising a minor proportion of a high molecular weight linear aliphatic hydrocarbon polymer and a major proportion is used.   a substantially linear copolyester having a linear chain   molecular film consisting of patterns corresponding to diol type units and acid type units from: (a) one or more aliphatic diols;   (b) terephthalic acid to an extent not   less than 60 moles per 100 moles of acid type units; el   (c) one or more aliphatic dicarboxylic acids   aromatic or aromatic compounds comprising a dicarboxylic acid having a difunctional aliphatic hydrocarbon residue having not less than 5 carbon atoms in the molecular chain, the units being chosen so that the adhesive composition has a softening point (ball method and   of the ring) between 1200C and 2101C.   2. Method according to claim 1, characterized in that sets the margins of a shoe upper on the   side of the shoe, between its front and   first, using a glue composition   as specified in claim 1.   3. Method according to claim 2, characterized in that the sides are mounted simultaneously on the opposite sides of the shoe in a machine for progressively mounting the sides of the shoe with the help of mounting wheels during the relative movement between the rollers   and the shoe in the direction of the length thereof.   4. Process according to any one of the claims   characterized in that the glue composition has a softening point (ball and ring method) between 1700C and 2000C, and a   viscosity at 240 ° C from about 900 to about 1100 poise.   5. Process according to any one of the claims   characterized in that the polyester comprises units consisting essentially of diol-type units derived from 1,4-butanediol and acid-type units derived from a dimerized fatty acid, from an oil, at a rate of 2. to 20 moles per 100 moles of acid-type units   in the copolyester, and acidic patterns from   of terephthalic acid and isophthalic acid at 80 to 98 moles per 100 moles of copolyester acid.   6. Process according to claim 5, characterized in that the units deriving from terephthalic and isophthalic acids together constitute not less than about 95 moles per 100 moles of the acid-type units, and the units derived from a dimerized fatty acid originating from oil does not constitute more than about 5 moles per 100 moles of acid type patterns.   7. Process according to claim 6, characterized in that the units originating from terephthalic acid constitute from 70 to 80 moles per 100 moles of acid-type units, and the units deriving from isophthalic acid constitute from 15 to 25 moles. per 100 moles of the patterns of acid type.   8. Process according to any one of the claims   tions, characterized in that the hydrophilic polymer   high molecular weight linear aliphatic carbide is or comprises a polyolefin with a melt index of between 5 and 200.   9. Process according to claim 8, characterized   in that the polyolefin is low density polyethylene.   10. Process according to any one of the claims   tions, characterized in that the hydrophilic polymer   linear aliphatic carbide is present at a rate of 2 to   % A of the weight of the glue composition.   11. Shoe characterized in that its sides are mounted by applying a method according to any one of the preceding claims.