JPH07111002B2 - Leather processing method and glove manufacturing method - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a method for treating leather in which tacking is permanently applied on one side and detackified on the other side (non-tacked back side, hereinafter referred to as NTB), and a glove made from the leather. Manufacturing method.

BACKGROUND AND PRIOR ART It is generally known to provide tackifier gloves for applications where improved grip reliability is important, such as golf, racketball, tennis, squash, saskar, football, baseball and the like.

To achieve that, various coatings have been used, such as polyurethane and latex. Moreover, in German Patent Publication No. 2840197,
It is proposed to coat the tacky material on the surface of the glove, preferably by the use of a deposition spray.

However, none of these known means are completely satisfactory. Urethanes and latex lack the required tack or coefficient of friction and the "feel" of the leather
Does not have. Moreover, the spray-type adhesive coating is
It lacks in permanence and tends to deteriorate leather.

Furthermore, the applicant's co-pending patent application, No. 443,655
No. 2, 1982, filed Nov. 2, 1982 (see Japanese Patent Application Laid-Open No. 59-101169), various hydrocarbon resin-impregnated tackifying coatings are described.

In Applicants' previous method for tackifying leather, tacking was performed on both sides of the leather. This is a disadvantage in gloves because it is unpleasant that the inner surface that comes into contact with the sticker's hand is sticky.

The above mentioned German document does not have this problem as it sprays the tackifying coating onto the surface of the leather, but it also does not apply to gloves when tackified by impregnation in a solution of tackifying resin. It does not have the desired permanence given to it.

OBJECT OF THE INVENTION AND A SHORT SUMMARY An object of the present invention is thus a non-stick inside which is permanently tacked by impregnation to obtain the desired coating durability, but with the "feel" of leather. It is to provide a method for treating leather for gloves having a surface.

Another object of the invention is to provide a method for producing such gloves.

Yet another object of the present invention is to provide a permanently tackified leather which has been tackified on the outside or grained side and detackified on the inside or backside and which is permanently tacked by impregnation.

That is, the present invention comprises: a. Impregnating the leather with the solution by immersing the leather in an organic solvent solution containing an isobutylene-butene copolymer and a hydrocarbon tackifying resin; b. E.g., thereby tackifying both sides of the leather, and c. Detacking the leather by applying an organic solvent solution containing nitrocellulose and a silicone resin to at least a portion of the inside or back side of the leather, and d. Evaporating the solvent from the leather of step c).

The present invention further includes: a. Immersing the leather in a solution containing an isobutylene-butene copolymer and a hydrocarbon tackifying resin in an organic solvent to impregnate the leather with the solution; and b. Impregnating the leather sheet. To evaporate the solvent from it, thereby tacking both sides of the leather, and c. Tacking the leather by applying an organic solvent solution containing nitrocellulose and a silicone resin in an organic solvent to at least a portion of the inside of the leather. Remove the solvent from the leather of step d., And e. Sew the leather into a glove in which the outer side is tackified and the inner side is detacked, but the feel of the leather is still Provided is a method of making a glove having a step of holding, having a tackified outer surface and a detacked inner surface.

Nitrocellulose itself provides a barrier between the user's hand and the tackifying surface, but the feel of dried nitrocellulose is rather hard and not leather-like. On the other hand, silicone resins that do not coexist with nitrocellulose do not impart the desired degree of adhesion to the substrate. By using both of these substances together, it is possible to obtain a desirable non-tacky inner surface that has suitable adhesion and yet retains the "feel" of the leather.

When an excess of silicone is used, the gloves have an uncomfortable, slippery feel and, if used in too little, a hard, non-leather feel of nitrocellulose.

By using the appropriate amount of silicone in combination with nitrocellulose, it is possible to achieve a pleasant, dry and non-tacky feel.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top view of the palm of a glove according to the present invention.

FIG. 2 is a side view of the glove of FIG.

DETAILED DESCRIPTION The method of the present invention is applicable to a wide variety of leathers, such as calf leather, cow leather, burette and pig leather. The leather must be in a crusted state before processing,
That is, it should be unfilled and finished and preferably chrome tanned.

With respect to the tackifying composition, a wide range of hydrogen peroxide tackifying resins can be used. For example, an aromatic hydrocarbon resin and an aliphatic hydrocarbon resin can be mentioned.

A particularly suitable tackifying resin is available from Pennsylvania Industrial Chemical Company, 15025, Creaton, Pa., Such as Piccolite.
yte) S70-like, Piccopale type,
It is a polymerized hydrocarbon resin.

Synthetic hydrocarbon polymers, such as isobutylene-butene copolymers, are used in combination with the hydrocarbon resin. An example of such a copolymer is Poly S2000 (High Molecular Weight Mono-, available from New York 11021, Great Netk, Northern Boulevard 445, S & S Chemical Co.).
Olefin content 95-100%, the balance is isoparaffin).

The organic solvent for the tackifying solution is VM & P naphtha, heptane or other non-polar conventional organic solvent.

In preparing the tackifying solution, the isobutylene-butene copolymer and the hydrocarbon resin are separately mixed and dissolved with a portion of the organic solvent and then mixed together with one more solvent to achieve the desired specific gravity. Is desirable.

Although it is possible to use a wide range of ratios of isobutylene-butene to hydrocarbon resin, it is recognized that about 10: 1 to 1:10 parts hydrocarbon resin per part copolymer can be used. . A ratio of 10 parts copolymer to 1 part hydrocarbon resin is preferred.

The resulting tackifying solution desirably has a specific gravity of about 0.770 at 22 ° C.

The impregnation is carried out by immersing the leather in the tackifying solution for about 1-2 minutes and then suspending it at room temperature under a slowly rotating air fan until the leather is dry.

Formulations have been found which provide a desirable non-stick surface for detackification of the backside of the leather, yet yet provide adequate adhesion to the substrate and feel of the leather.

Silicone resins do not readily adhere to already tacked surfaces. However, the coexistence of the nitrocellulose binder mixed with the silicone provides satisfactory adhesion of the silicone to the already tacked fibers.

The ratio of silicone resin to nitrocellulose resin can vary widely, for example from 1:30 to 1:10, with about 1:17 being preferred.

Application of the detackifying composition can be effected by use of spraying or other conventional coating method followed by drying for solvent removal.

The amount of detackifying agent used can vary widely depending on the amount of detackifying effect desired.

The recommended amount is that which increases the weight of the leather by 5-7%.

The following is a scheme of an embodiment that can be used to carry out the present invention.

Example A. Tackification Procedure One sheet of calf leather was used to prepare a VM & P naphtha solution containing 10 parts by weight of poly S2000 isobutylene-butene copolymer to 1 part by weight of Pitsucolite S70 hydrocarbon tackifier. It was permanently tacked on both sides by immersion in it.

The leather was dried to give a leather that was permanently tacked on both sides.

Detackification Procedure for BNTB The above tacked leather sheet was placed on the back side from Hydromead 52% by weight Hydroholac SD-270 Nitrocellulose Rucker Emul, from Rohm Endhaas, Inc., 19105, Philadelphia, PA 19105. It was treated with a solution consisting of 3% by weight of silicone resin LS-3399. The latter is a xylene solution of a silicone resin from Rohm Endhaas Company, Pennsylvania 19105.

Solvents for the above additives are 45% by weight thinner LS
It is −3082. It is a mixture of _n -propyl acetate, methyl ethyl ketone and toluene, also from Rohm Endhaas.

After dissolving the nitrocellulose and the silicone additive in a solvent, the solution was sprayed on the back side of the leather and the leather was dried.

This leather had a tackified outer (textured) surface, and on the inner (back) side it had a smooth, soft and natural feel to the hand.

The leather was cut and sewn into a glove with a permanently tacked outside and a detacked inside with a pleasant feel.

In the manufacture of tacked gloves 1, referring to FIGS. 1 and 2, tacked NTB leather generally includes all of the thumb, index and little fingers of the glove's palm, and optionally the palm of the glove. It is preferable to use only on the side of. The tacky side of the leather 2 faces outside,
The NTB (non-stick side) 3 is on the opposite side of the palm and fingers. The other part (back side) of the glove can be made entirely of detackified glove leather or other conventional glove material.

Modifications of the above, which are within the spirit and scope of the invention, will be apparent to those skilled in the art.

Claims (2)

[Claims] 1. A leather is impregnated with the solution by immersing the leather in an organic solvent solution containing an isobutylene-butene copolymer and a hydrocarbon tackifying resin, and b. Evaporating, thereby tackifying both sides of the leather, and c. Detacking the leather by applying an organic solvent solution containing nitrocellulose and a silicone resin to at least a portion of the inside or back side of the leather, and d . A method of treating leather, comprising evaporating the solvent from the leather of step c. 2. A leather is immersed in a solution containing an isobutylene-butene copolymer and a hydrocarbon tackifying resin in an organic solvent to impregnate the leather with the solution, and b. From the impregnated leather sheet. Evaporating the solvent, thereby tackifying both sides of the leather, and c. Detacking the leather by applying an organic solvent solution containing nitrocellulose and a silicone resin in an organic solvent to at least a portion of the inside of the leather. D. Evaporate the solvent from the leather in step c, and e. Sew the leather into a glove in which the outer side is tackified and the inner side is detacked but still retains the feel of the leather A method of making a glove having a tackified outer surface and a detacked inner surface.