CN87107924A

CN87107924A - Be used to do the production method and products thereof of the leather of vamp

Info

Publication number: CN87107924A
Application number: CN87107924.0A
Authority: CN
Inventors: 安东尼奥·路希尼
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-11-18
Filing date: 1987-11-18
Publication date: 1988-06-01
Also published as: FI892363A0; PT86161A; PL268885A1; IL84437A0; PT86161B; RU1777608C; ZA878523B; EP0324734A1; HU203386B; DD279691A5; IT8648666A0; HUT50362A; BG50390A3; AU7302587A; WO1988003958A1; JPH02500444A; AU606059B2; IT1199294B; TR23044A; EP0324734B1

Abstract

Be used to make a production method of the vamp leather of wearing spring and summer, wherein after traditional bath method procedure of processing and in the dry process process, after perforation or thorn hole operation, carry out twice processing respectively with acrylic resin, in case acrylic resin polymerization, just give leather with on the one hand better density and intensity, on the other hand owing to cover the result of leather internal surface on corresponding to the position of eyelet or acanthopore, improve the surface strength of leather, therefore avoided when wearing, occurring expanding, stretch and tearing the danger of phenomenon.Resulting by this method leather spy is used to make the vamp of the footwear of wearing spring and summer.

Description

The present invention relates to the production method and products thereof of the leather of a vamp that is used to make footwear.More particularly, the present invention relates to have the treatment process of woolen sheepskin, to obtain having the perforation or the acanthopore leather of density and intensive property, needing these characteristics, described foxing when its internal surface of preparation has the woolen vamp is the footwear that are used in dress spring and summer.

This method by respectively after retanning and perforation step with the acroleic acid resin of various compositions to the processing operation of described leather and distinguish mutually with the relevant traditional operation that carries out on the woolen sheepskin that has.

At present, be suitable for the month of heat, particularly dress in summer, and use the vamp of doing with calf skin and do not have lining in its inside, required density and the acanthopore of intensive property or footwear of perforation when this vamp has special the use, well-known.

But, this leather products demonstrates the relatively poor shortcoming of health care, because there is the hole, and with regard to the friction that between the skin of the internal surface of vamp and pin, produces inevitably and externally and the insufficient heat exchange between the inside also be quite uncomfortable, described heat exchange is as being essential with the optimum temps in a kind of safe method maintenance footwear.

In other words, the terms of settlement that prior art proposed that is used to make the leather of the footwear of wearing summer generally includes the utilization of material, as cloth, it can guarantee perspire, but this material can not provide certainly as a kind of competent footwear, and it can not stand the quick loss that the effect owing to weather, impact or other external stress etc. causes.

Therefore, be clearly to the requirement of the leather that is used to make the vamp of saving than the hot season, though this vamp has aperture or hole, do not show above-mentioned shortcoming, and make a kind of footwear of making can have desirable intensive property, weather resistance and comfortableness.

In order to reach this requirement, the present invention proposes, perforation or acanthopore leather that use gets from having the woolen sheepskin, starting material as the vamp of making the footwear in summer, this is feasible, because there is a wool layer in the surface and can forms a tectum within it, this tectum suits, because the round-robin characteristic of the attribute of its a constant internal temperature of maintenance and assurance air, so that avoid the overheated of pin and therefore and the perspiration of the pin that comes, and, because its intrinsic antistatic property has reduced the importing of dust.In addition, the characteristic that has the non-pressurised district that produces any part that is positioned pin according to leather proposed by the invention, therefore a kind of uniform comfortable be assurable, and above-mentioned leather finally demonstrate a kind of stimulator that follows as the peripheral blood pendular ring be well suited for and be useful as a kind of vehicle that can absorb the electrostatic energy that produces in the human body.

But, have the starting material that the woolen sheepskin constitutes in order to utilize, do not consider that some its original character is impossible, the characteristic that for example has the fibrous texture of suitable shredding, because a large amount of bristles and the existence that also has very short fiber make that this material itself is inappropriate as vamp.

Therefore, for the leather products that makes acanthopore or perforation is suitable for going out to send to make the spring and summer footwear from having the woolen sheepskin, the present invention proposes to carry out acrylic resin and handles operation after the end of retanning step and perforation or acanthopore step.

In fact, by this operation, can obtain double result:

A) give higher density of this leather and intensity, then then can be and the danger of not tearing this leather to this leather perforation or acanthopore, and can make vamp by making this leather mix desirable pattern;

B) increase the intensity of this leather in position corresponding to the internal surface of eyelet, in order to avoid this leather in all possible many expansions and tearing when wearing of relevant described surface location.

As mentioned above, the elementary operation of the method according to this invention is in a kind of tanning treating processes according to the method band retanning of traditional type and finishing, inner and at the fibrous texture of this leather corresponding to the position of the internal surface of eyelet or acanthopore, the coating and the successive polymerization (in two consecutive steps) of acrylic resin are arranged.

In fact, this operation is to carry out after the final section of retanning step and perforation or acanthopore step.The conventional process flow figure general provision that leather is handled the different step of bath method processing and the different step of dry process.

Or rather, this tradition processing of carrying out in a bath is carried out according to following successive operation steps:

A) soaking step, wherein by an a kind of mixture by cold rinse bank and a kind of tensio-active agent such as FORYLL BB(absorption agent, not only anionic but also non-ionic, can buy from Henkel (Henkel) company) a kind of bath of being mixed with, organic residuum and blood in the rawhide are removed, and rawhide deliquescing, to avoid the continuous processing of particle fiber, then in enzyme product (resulting enzyme based products from the pancreas bacillus) slow as REVERDASE sieve 120(-Planck (Rohne Poulenc) company) between action period, this rawhide is returned to again the natural concentration of its water;

B) scrape the meat step, wherein remaining muscle fragments and fat lump group are removed after peeling operation, and subcutaneous layer also is removed, and then the tanning material can ooze this rawhide more even and apace thoroughly;

C) cleaning step, a part of natural fat of wherein remaining foul and existence is removed from this rawhide, and remaining natural fat becomes and is more evenly distributed after this step; This step can utilize the emulsive tetrachloroethylene to carry out preferably, and it quickens this processing;

D) dipping (or acidleach) step, the transition step of expression from biological condition to the Antibiology state in this operation, is more suitable in allowing chromic salts pass through by making rawhide, rawhide will be performed carry out the chrome tanning preparation;

E) tanning step is wherein carried out traditional processing (basic chromium sulfate, pH value 2.8) with a kind of chromic salts, obtaining not only softness but also enough fine and close, and the leather of inductility, and allow perspire;

F) step is removed in acid, wherein after on beam, shelving about 48 hours tanning maturation period, a kind of compound that constitutes by means of the mixture of the buffering salt that plays neutralizing effect (for example, the CORATIL ND that can buy from Henkel KGaA), make the hydrolyzable sour key neutralization (because of this acid causes uneven dyeing) that is combined in the proteinaceous substances;

G) retanning step wherein gives higher intensity of this leather and density, and the better adaptability of meticulous flour milling or the like.

The dry process of traditional type is based on the operation steps of finishing, perforation or acanthopore and continuous finishing antithesis.

According to the present invention, procedure of processing becomes with top two steps of having narrated and combines like this, wherein carries out with acrylic resin and handles.

More particularly, during the retanning step, and or rather, in the last part of retanning operation, in order to obtain the enhancing of fibrous texture, be by means of using acrylic resin, or rather, finishing by means of a kind of acrylate, in it is merged in fiber and during polymerization, it is thicker close to cause the fiber mesh structure to become, and the result gives leather with except that higher density and intensity, also has the needed intensity of continuous acanthopore or perforation procedure in addition.

Second step operation as the feature of the method according to this invention, during dry process, carry out, after acanthopore or perforation step, it comprises uses the surface (in the inboard, hole) of handling the exposure of this leather by a kind of acrylic type resin of the mixture of a kind of vinylformic acid and a kind of acrylate preparation, purpose is in order to improve the surface strength corresponding to this leather of the position of the inwall in hole, with the danger of avoiding presumable in use many expansions and tearing this leather.

Therefore, a clear and definite purpose of the present invention is the production method of the foxing of (providing) a kind of footwear that are used to make dress spring and summer, described method is characterised in that after the bath method processing of sheepskin, described processing comprises soaking step, scrape the meat step, cleaning step, dipping (or acidleach) step, the tanning step, step and retanning step are removed in acid, leather is handled with a kind of acrylate-based resin aqueous solution, this resin generation polymerization, therefore original fiber mesh structure becomes more thick close, and comprising one first finishing step, one wherein leather by the dry process of the step of acanthopore or perforation and one second finishing step during, further handle the polymerization on of this resin corresponding to the position of the internal surface in hole for a kind of resin aqueous solution of base in order to vinylformic acid and acrylate.

The selection of the type of the acrylate copolymer of the final stage that is used for the retanning operation that is proposed in the present invention, if compare with the rosin maleic resin, be significant and be rich in innovative spirit with the traditional trimeric cyanamide resinoid that is used for this operation or urea aldehyde (ureic) resin, dicyanamide resinoid, polyurethane resinoid.

In fact, well-known, some described resin and particularly polyurethane resin and rosin maleic resin, the most frequently used, be unsuccessful giving aspect enough densityes of leather and the intensity.

By the same token, melamine resin and urea-formaldehyde resin also must be got rid of, although this resin helps giving goodish feel of leather and softish character.

The dicyanamide resinoid can provide desirable intensive property antithesis, but because it like the adaptability of the leather of the characteristic of having destroyed the chrome tanned leather step to a great extent and nearly all staining procedure, and can not reach purpose of the present invention.

The present invention advises using with aqueous solution form and exists rather than use the acrylic resin that exists with the water-dispersion form, its purpose is to obtain preferably a kind of and invades oozing thoroughly of leather more completely to replace only obtaining the surface deposition that a kind of meeting causes product to become extremely hard, in addition, this suggestion increases the painted productive rate of negatively charged ion of used leather reliably.

In the method according to the invention, acrylic ester polymer is added to during the neutralization that is made of 50 ℃ water and a kind of sour remover (for example above-mentioned CORATIL ND) bathes, and floods this leather and be adjusted to pH value to be about 6 in this baths.

Observe meaningly: according to the use of neutralization bath proposed by the invention, not only have the effect that allows chromium to be fixed, the acrylic ester polymer (for example ICATAN38 of Ai Kepo (Icap) company) that allows simultaneously to be used with aqueous solution form oozes effectively thoroughly.

After being preferably in about 1 hour, after neutralization takes place fully, when concentration is 7 grams per liters, this acrylate is added in the neutralization bath, so that on the relatively poor position of the intensity of leather own, or rather, in the limit portion that structure does not more relax and fiber is long, leather fiber has the possibility of oozing thoroughly largely.

Again, according to the present invention, after experience for some time of 30 minutes to 2 hours, promptly when this resin itself enters leather fully, polymerization at first takes place by adding a small amount of formic acid in this acrylate resin, so that this resin is incorporated on the fiber of leather, then, polymerization directly for the second time takes place on the leather of complete drying under dry status, pressure of living in is 20 kg/cm ², temperature is about 100～120 ℃, lasts 4～8 seconds.

After this has the acanthopore step of woolen leather, the thorn hole operation be by with have narrow meshed pressing plate press carry out, with a kind of plastic resin treatment of vinylformic acid and a kind of acrylate (composition), carry out according to the top method that discloses.Described processing preferably is placed on by being somebody's turn to do leather through acanthopore that dipping carries out in 50～60 ℃ of water-baths, wherein the pre-polymerization resin of vinylformic acid and a kind of acrylate (DRASIL-ANG that for example can Henkel KGaA have bought) is imported into about 4～6 grams per liters of concentration, and making this resin by interpolation formic acid is under about 60 ℃ in temperature, lasts last polymerization in about 30～45 minutes.

Therefore, this resin just is deposited on the surface of the leather of acanthopore, promptly on position corresponding to the inwall of eyelet, there this resin itself is absorbed by unlapped fiber, a result as the acanthopore step, then obtain favourable result, mentioned, improved the surface strength of this leather as top.

Purpose of the present invention also relates to the leather that obtains by aforesaid method.

The present invention will disclose with reference to accompanying drawing below, only for example rather than in order to limit purpose, wherein

Fig. 1 is a skeleton diagram of the method according to this invention, and

Fig. 2 is the perspective illustration that has used the shoes that resulting leather is made according to the present invention.

With reference to Fig. 1, can see and handle a kind of each operation steps that these steps are divided into group A in detail with woolen sheepskin, wherein step is put together, and it is characterized in that the processing of bath method, and group B, wherein step is put together, and it is characterized in that dry process.The distinguished step that the present invention proposes is two operations, wherein is to carry out with acrylic resin to handle, and such operation is interted in the downstream of group A with after the acanthopore step of group B.

In group A, can distinguish biology stage of processing, comprise soaking step, scrape meat step and cleaning step, one for the transition step of dipping (or acidleach) operation and one comprise tanning, acid is removed and the Antibiology step of retanning operation.

Dry process (B) comprises the finishing step, acanthopore step, as the treatment step and the continuous finishing step of a kind of acrylate copolymer of usefulness of feature of the present invention.

More particularly, the technology of above-mentioned graphic extension and feature of the present invention can be summarized as follows:

A) will have woolen gives birth in the sheepskin material immersion cooling bath (rawhide will be used 20 premium on currency), described cooling bath contains FORYLL BB, a kind of tensio-active agent that can buy from Henkel KGaA, concentration is 1 grams per liter, and make whole bath standing over night, wash till the water that washes becomes clearly with leading flowing water the next morning again, add FORYLL BB(1 grams per liter then) and REVERDASE 120(0.2 grams per liter), and make rawhide in this cooling bath, keep somewhere 48 hours (soaking step);

B) after scraping the meat step, prepare one by 35～38 ℃ of water and 1.5 grams per liter tetrachloroethylenes (as solvent) and 3 grams per liter FORYLL BB(tensio-active agents) bath that constitutes, and with the ratio of per 20 liters of rawhides above-mentioned rawhide is put into this bath and flood, then, wash rawhide with flowing water;

C) prepare a cooling bath with the salt (about 4 ° of Be ') that adds 40 grams per liters, and with the ratio of per 20 liters of rawhides rawhide is placed on and reaches 30 minutes in this cooling bath; Then, a kind of organic acid (for example BASCAF F of Baden's aniline soda (BSAF) company) that adds 2.5 grams per liters, and this cooling bath was left standstill 2 hours, add the formic acid of 3 grams per liters again, and make rawhide in the pH value is this cooling bath of 2.8, keep 2～3 hours (dipping (or acidleach) step).This dipping (or acidleach) operation, purpose is to prepare for the chrome tanning step of rawhide, and they are more suitable in allowing chromic salts pass through rapidly, as a result of the sour characteristic of bathing, chromic salts becomes than torpescence, thereby so that they ooze thoroughly more even.The adding of salt is essential, with the swelling of the rawhide of an effect avoiding existing as acid;

D) the described rawhide of following then processing (tanning step):

(every rawhide need with 20 liters) handles 2 hours in a cooling bath that contains liquid chromic salts, ratio with 1.6 grams per liters, the GRASSANDHS that adding can have been bought from Henkel KGaA, this bath was left standstill 1 hour, add the IMP.LENAL AP that can buy from Baden aniline soda (BASF) company then, and rawhide remained in this bath 1 hour again, add the liquid chromic salts of 10 grams per liters at last, this rawhide was remained in the described bath 2 or 3 hours; Add the yellow soda ash of 1 grams per liter and the sodium bicarbonate of 1 grams per liter again, allow this rawhide be immersed in this bath 3-4 hour; Then this rawhide is layered on the beam.

Carry out operation by this method, make the leather that is prepared into be suitable for making vamp, because resulting leather is by tanning well, have about 90 ℃ of a temperature T g, and soft, have like rubber feel and enough densityes, and inductility, can allow perspire freely in addition.

In fact, as can be seen, except that being easy to evenly ooze thoroughly for about 2.8 o'clock adding basic chromium sulphates make, can also add a kind of synthetic sulphite fat (GRASSAN DHS) and a kind of sequestering agent (IMPLENAL AP) that shows chrome tanning filling and stabilization to electrolyte stable in the pH value.The last a kind of basic cpd that adds makes this chromium cpd molecule bigger and this chromium cpd is fixed between the fiber of leather in order to reach in final step, with the purpose of the leather that obtains demonstrating the tanning preferably of firm and blocky a kind of quilt;

E) remove in the step in acid, it is to shelve to make after the leather slaking of tanning in about 48 hours on by a beam to carry out, and uses the bath of 45 ℃ of water, dipping described leather (with the ratio of per 20 premium on currency, one block leather) in this is bathed; Then, add the CORATIL ND of 2 grams per liters, this processing was carried out 1 hour, then added 3 grams per liter GRASSAN DHS again, and this processing is carried out and 1 hour;

F) the retanning step finishes, and after the retanning step of carrying out according to traditional method, is that this processing is a feature of the present invention by the processing of insertion with a kind of acrylic resin; According to practice, leather is (with the ratio of per 8 premium on currency, one block leather) handled in one 45～50 ℃ the water-bath of the ICATAN38 of CORATIL ND that contains 7.8 grams per liters and 7 grams per liters.

After the meticulous flour milling of the flesh noodles of leather, and after by the dyeing of dying leather in advance, carry out the dry process step;

G) by apply the aqueous dispersions of a kind of aliphatic polyurethane (Astacin Finish PUD) in advance to this leather, ratio with a leather of 80～100/ grams, under 110 ℃ and 150 normal atmosphere, be accompanied by after the tectal traditional finishing operation that must form of a kind of polymerization, bore a hole or sting hole operation.Constituting feature of the present invention is to contain the DRASIL-ANG that can buy from Henkel KGaA by this leather is immersed in second step, be a kind of prepolymerized methacrylic resin of current liquid status, concentration is that of 4～6 grams per liters remains in 50～60 ℃ the water-bath and carries out.Then, under 60 ℃, added formic acid within 45 minutes, along with in the lip-deep a kind of sedimental formation corresponding to eyelet (h) inner wall position through the leather of acanthopore or perforation, this polymerization is promptly accused and is finished, and carries out further finishing (i).

Fig. 2 illustrates according to the present invention resulting leather and is used for the application that vamp is produced; Wool layer 1 is found in the inner face of these footwear, and the imitative chamois leather of eye simultaneously with holes (3) or napping leather (2) are found in the outside of these footwear.

For test is used for producing several standard tests that the required character of leather of vamp is carried out, reported the result hereinafter.

On the cheese cake sample (sample A) after handling according to the present invention, and the test of being carried out on the undressed cheese cake sample (B) is as follows:

The mensuration of tensile strength and elongation;

The mensuration of tear strength;

By the anti-mensuration of stretching intensity and tensile strength of the leather particulate of ball-pressure method;

By constantly folding to the thin skin leather wear resistance and the mensuration of the wear resistance of their surface sizing.

Sample A(handles according to the present invention)

Standard method: UNI ISO 3376-tensile strength and anti-mensuration of stretching intensity.

On a tensile test equipment, the sample through overregulating stands a kind of tensile stress to fracture rightly.

The breaking load or the load that breaks promptly get tensile strength divided by the cross-sectional area of sample, and with Newton/millimeter ²Provide.

Initial length and the difference between its final lengths by sample are come the calculating limit elongation.This difference is used for the percentage of the initial length of sample and is represented.

Regulate and test: normal pressure, the A1 type (20 ± 2 ℃ 65 ± R.H.).

-UNI ISO 2589-leather-instrument testing-Determination of thickness

Sample tensile strength (Newton/millimeter ²) ultimate elongation, (%)

1 11.4 39.4%

2 12.35 42.2%

3 12.52 44.0%

Average tensile strength=12.1 Newton/millimeter ²

The limit-in-mean elongation, 1%=41.87%

The mensuration of standard method UNI ISO 3377 IUP8-tear strengths.

With one wherein the breach rectangle sample that exceeded the defined shape hang on the external part of a pair of sample chuck between the pressing plate that is fastened on a tensile test equipment.The elongation stress that causes described sample chuck to throw off required maximum is considered to tear strength values.

Regulate and test: normal pressure, (23 ± 2 ℃ 50 ± 5%R.H.) of A2 type

Pulling speed: 100 ± 10 millimeters/minute

Sample tear strength (Newton/millimeter)

1 51.6

2 44.5

3 42.3

Average tear intensity=46.12 Newton/millimeter

Test one ball-pressure method of standard method UNI ISO 3379-leather particulate tensile strength and tensile strength.

A steel ball is pressed in cuts into dish type, along its circumferential section flesh noodles middle body of a leather sample of fastening firmly.

When this leather particle begins to chap and the explosion (possibility) of leather when taking place, write down at any time that ball is pressed and the stretching of sample certainty.

Regulate and test: normal pressure, (20 ± 2 ℃ 65 ± 5%U.R.) of A1 type

Sample 123

Crack formation load (newton) 137.2 303.8 250.8

Draw be full of cracks intensity (millimeter) 5.4 6.1 6.0

Bursting strength (newton) 470.4 678.1 527.2

Explosion stretching (millimeter) 7.2 9.3 8.6

Average crack formation load: 230.6 newton

Average crack formation stretches: 5.8 millimeters

Average explosion load: 558.6 newton

Average explosion stretches: 8.3 millimeters

Standard method: the mensuration of the anti-reusability of UNI 8433/TUP20-thin skin leather and leather surface applying glue (this uses and is continuous folding).

This mensuration is to be undertaken by the two ends that each specimen holder are held in testing tool.

One of this two bare terminal end is maintained fixed, and another bare terminal end is then swung with the frequency of 22.5 ° of amplitudes, 100+5 cycle per minute, and it just is being with folded swatch like this.

One regulates and test: normal pressure, the A1 type (20 ° ± 2 ℃ 65 ± 5%R.H.),

One 6 obtain being of a size of 70 * 45 millimeters rectangle sample by shearing.

Test all numbers: 50,000 weeks.

End of test (EOT), this sample do not demonstrate any be full of cracks or any other deterioration sign.

The undressed sample of sample B()

Standard method: the test of UNI ISO 3376-tensile strength and tensile strength.

On a tensile strength tstr, sample stands the stress until fracture after regulating.

By ultimate elongation load is calculated tensile strength divided by the cross-sectional area of sample, and use Newton/millimeter ²Represent.

Differing between the initial length by calculation sample and its final lengths obtains ultimate elongation.This difference is used for the percentage of the initial length of this sample and is represented.

Regulate and test: normal pressure, (20 ± 2 ℃ 65 ± 5%R.H.) of A1 type

-UNI ISO 2589-leather-instrument testing-Determination of thickness

Sample tensile strength (Newton/millimeter ²) ultimate elongation, %

1 21.78 60.6%

2 19.7 46.8%

3 15.96 45.6%

Average tensile strength=18.97 Newton/millimeter ²

The limit-in-mean elongation, %=51.0%

The mensuration of standard method UNI ISO 3377 IUP8-bearing strengths.

With one wherein the breach rectangle sample that tripped out the defined shape hang on the external part of a pair of test agent chuck between the pressing plate that is fastened on an extensometer.The required maximum elongation load that causes described sample chuck to be thrown off is considered to tear strength values.

Regulate and test: normal pressure, (23 ± 2 ℃ 50 ± 5%R.H.) of A2 type

Pulling speed: 100 ± millimeter/minute

Sample tear strength (Newton/millimeter)

1 73.1

2 68.1

3 64.1

Average tear intensity=68.6 Newton/millimeter

Test-the ball-pressure method of standard method UNI ISO 3379-leather particulate tensile strength and tensile strength.

A steel ball is pressed in cuts into dish type, along the circumferential section flesh noodles middle body of a leather sample of fastening firmly.

When this leather particle begins to chap and the explosion (possibility) of leather when taking place, write down the stretching of ball pressure and this sample at any time.

Regulate and test: normal pressure, (20 ± 2 ℃ 65 ± 5%R.H.) of A1 type

Sample 123

Crack formation load (newton)---

Freedom from cracking intensity (millimeter)---

Explosion load (newton) 510.0 589.0 478.0

Explosion stretching (millimeter) 10.5 9.2 9.0

Average explosion load: 528.6 newton

Average explosion stretches: 9.5 millimeters

The mensuration of the anti-reusability of standard method UNI 8433/IUP20-thin skin leather and leather surface applying glue (this uses and is continuous folding).

One of this two bare terminal end is maintained fixed, and another bare terminal end is then swung with the frequency of 22.5 ° of amplitudes, 100+5 cycle per minute, and it just is being with folding leather sample like this.

Regulate and test: normal pressure, (20 ° ± 2 ℃ 65 ± 5%R.H.) of A1 type

-6 obtain being of a size of 70 * 45 millimeters rectangle sample by shearing.

-test all numbers: 50,000 weeks.

End of test (EOT), this sample does not demonstrate the person's movements and expression of any be full of cracks or other deterioration.

Tabulate down and 1 summarized the result of above-mentioned process test.

Table 1

The ewe skin of character sample A sample B cheese cake

(treated) (undressed) parameter parameter

Average tensile strength 12.1 18.97 10 8

Newton/millimeter ²Newton/millimeter ²

Elongation 41.87% 51% 40% 40%

Tear strength 46.13 68.6 40 40

Average explosion loads 558.6 528.6 120 120

Explosion stretches 8.3 9.5 7.5 8

Average be full of cracks load 230.6 120 120

Average be full of cracks stretches 5.8-7.5 8

Very test carefully

(50,000 deflections)

Can find out that from this table the resulting value of sample A is not only good than the resulting value of ewe skin from the vamp that is used to produce footwear, and not worse than the result of relevant cheese cake.

The present invention is by disclosing with reference to some concrete examples, but much less can improve and change in the present invention certainly and do not exceed the spirit and scope of independent claim of the present invention.

Claims

1, be used to make a kind of production method of leather of vamp of the footwear of dress spring and summer, described method is characterised in that, after bath method processing with woolen sheepskin, described processing comprises soaking step, scrape the meat step, dipping (or acidleach) step, the tanning step, step and retanning step are removed in acid, with a kind of of aqueous solution state is the plastic resin treatment leather of base with the acrylate, this resin of polymerization is so that original fiber mesh structure becomes thicker close, and, one first finishing stage is arranged in the dry process step, in the acanthopore of a leather or perforation stage and one the second finishing phase process, after the thorn hole operation, a kind of vinylformic acid and a kind of acrylate with aqueous solution state are that basic resin is further handled, and described resin on the internal surface position corresponding to eyelet polymerization takes place.

2, a kind of method according to claim 1 is characterized in that wherein described acrylic ester polymer being joined during a neutralization that is made of 50 ℃ of water and a kind of sour remover bathes, the described leather of dipping in this bathes, and regulate the pH value and be about 6.

3, a kind of method according to claim 2 is characterized in that after wherein about 1 hour when described neutralization is finished described acrylate resin being joined in the described neutralization bath, is 7 grams per liters until concentration.

4, a kind of method according to claim 3, it is characterized in that wherein said acrylate resin, after 30 minutes to 2 hour for some time, when described resin itself infilters in the described leather fully thoroughly, cause polymerization for the first time with adding a small amount of formic acid, consequently described resin is incorporated on the fiber of described leather, and the subsequent second time is under the state of doing, polymerization directly occurs on the dried leather, is 20 kg/cm at pressure ², temperature is to last for 4～8 seconds under about 100～120 ℃.

5, according to any one described a kind of method of claim 1～4, it is characterized in that wherein by described leather through acanthopore being immersed in a kind of processing of using the resin of a kind of vinylformic acid and a kind of acrylate in 50～60 ℃ the water-bath that remains on, in described water-bath, imported resin through prepolymerized vinylformic acid and a kind of acrylate, its ratio in described water-bath is about 4～6 grams per liters, and by adding formic acid under about 60 ℃ of temperature, described resin is carried out polymerization fatefully last about 30～45 minutes then.

What 6, be used for that spring and summer, footwear uppers was produced has the woolen sheepskin at inner face, and described leather is that any one the described method by aforementioned claim 1～5 obtains.

7, according to claim 1～5 and the top a kind of production method and products thereof of leather of vamp that is used to make footwear that discloses particularly and describe.