DE2302893A1 - Impermeable textile material and the process for its production - Google Patents

Description

"ATENTaNWÄLTH

DR ₁ -ING ₁ RICHARDGLAWe DIPL-ING. KLAUS DELFS DIPL-PHYS. DR. WALTER MOLL

MUNICH HAMBURG MÖNCHEN

8 MÖNCHEN 26 POST BOX 37 LIEBHERRSTR. 20 TEL (0811) 22 65 48

2 HAMBURG WAITZSTR. TEL. (0411) 89 22

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MONKS

A 91

James North & Sons Limited

PO Box J), Hyde, Cheshire, England

Impermeable textile material and process for its manufacture

The invention relates to a fabric or a fabric in the form of length goods or items of clothing, in particular Gloves made from a flexible absorbent textile base material, e.g. a knitted or knitted fabric. knitted cotton material, which with a Layer of permanent flexible impermeable material, e.g. one made essentially of polyvinyl chloride existing layer, is equipped. One of those

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3toff is hereinafter referred to as the type mentioned designated. British Patent No. 624 795 describes a method for producing such items of clothing, in particular work gloves.

In the case of such substances, the layer material is only partially impregnated with the base material anchored. This leaves part of the thickness of the base material for the absorption of moisture, e.g. Sweat free.

It is known that when using such substances as a result of the uninhibited action of bacteria, in particular sweat bacteria, skin damage caused by bacteria or fungi, if such a substance with its non-impregnated part of the base material in practical use rests on the skin. So far, one has to be on the obvious Measure used, the basic material, as it was considered necessary in each case, directly with a bactericide or fungicide or both agents to treat the risk of skin damage of the aforementioned Kind of diminish.

The invention is based on the knowledge that the not impregnated part of the base material with suitable

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bactericidal or fungicidal K '^ ensehaften provided v / can ground by the layer material prior to the application of the same one to the base material in a suitable manner bactericidal and / or fungicidal additives referred to below as antimicrobial additives, is added.

Accordingly, the method of the invention encompasses manufacture a substance of the type mentioned, the steps of applying a containing the antimicrobial additive Layer material in liquid form on one side of the base material and a subsequent conversion of the sheet material in a permanent flexible impermeable form, wherein the base material with the liquid layer material is only partially impregnated.

Preferably, each of the additives used has a saturation vapor pressure between 2.5 Io and 5 * 5 χ 10 ~ mm / Hg at 20 ° C. and a generally linear dependence between 10 g ₁ ρ and rr Q over a considerable temperature range where ρ is its saturation vapor pressure and t is its temperature in degrees C and the gradient of the curve representing this dependence is in the range between -2850 and -j} 48o. A particularly advantageous additive has a saturation

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supply vapor pressure of K, ο χ 1Ο ~ mm / Hg at 20 ° C and a curve gradient of -yV {o over the temperature range from 100 ⁰ C to 250 ⁰ C.

The additive (s) are preferably against both gram-positive and gram-negative microorganisms effective.

A knitted or knitted light interlock fabric based on cotton is advantageously used as the base material used.

Suitable layer materials are advantageously materials consisting essentially of polyvinyl chloride as well as rubber or rubber or synthetic rubber used.

The additives are usually both a bactericide and a fungicide. A suitable advantageous one Additive is Ιο, ΐο'-oxybisphenoxarsine. A suitable one Composition - for use in performing the Invention containing this additive can be found under the name ESTABEX ABF VON DER Interstab Limited of Liverpool, England.

Another advantageous additive is 2, 4, 4 'trichloro-2 ¹ -hydroxydiphenyl ether. A suitable this

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Compound containing composition can under the Designation IRGA3AW DP ^ oo / on of Ciba-Geigy (U.K.) Limited of Manchester, England.

The invention also relates to a substance, in particular in the form of a glove, which by means of the above-mentioned method is made.

It has been found that additives such as those in exemplary Way mentioned can diffuse to a sufficient extent in the base material and this good and give permanent antimicrobial properties if they are added in small amounts to a conventional polyvinyl chloride dip paste, e.g. that known from German patent specification 624 795 is added. This realization is very surprising. As a result, gloves made from such a material, for example, offer an additional benefit Protection for the wearer in such a way that the effects of the microorganisms on perspiration are inhibited, so that the unpleasant odors of the decomposition products and the associated undesirable pathological Hazards can be avoided or significantly reduced. This leads to excellent protection against numerous unpleasant skin conditions.

-P-

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The additive (s) must meet certain requirements, which to a certain extent are self-evident. This differential thermal Analyzes must be such that essentially no decomposition takes place at temperatures which they follow exposed to the application of the coating. Spectrometric and / or gas chromatic measurements must also be carried out show that a suitable antimicrobial structure preserved. The selection of additives to be used for each particular case often has to be considered a specific end use of the substance. If the fabric is in the form of gloves for example to be intended for use in the food industry, the activity spectrum depend on the particular conditions in this industry. Of course there are additives with a wide range of activities with a corresponding general applicability. Broad spectrum of activity can also be obtained by adding two or more mutually compatible additives with different activity spectra used. Of course, no additive or any composition containing it, which are used to practice the invention result in a skin-irritating or dermatitic product. In general, it can be said that it is important for industrial use that the antimicrobial effect

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üWherever occurs or remains in the product.

For many modes of operation using the method of the invention, one advantage results with one significant practical importance. Not only is it no longer necessary to specially treat the base material, which is itself a significant benefit, but it also becomes a normal stage of work in the manufacture of the Basic material unnecessary. It is therefore not necessary to treat the base material as part of the finishing process with a cleaning substance, whereby by this treatment Substances are to be removed from the fabric which »promote the growth of harmful microorganisms and normally present in the textile material after previous treatment steps during its manufacture because the diffusion of the additive has an equivalent effect.

Another very useful consequence of the invention is that the use of other Additives is facilitated, which as a result of their tendency to cause undesirable pathological Effect particularly where microorganisms are present previously could not be used without a security risk. E.g. the use of chlorinated paraffins and oils based on hydrocarbons are advantageous

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adhered because these products are cheap and, at least to some extent, expensive, in dipping mixes and others Compositions used can replace plasticizers. Furthermore, it has surprisingly been found that in many cases these substances result in a layer of better quality, which is the resistance to it Abrasion and the penetration of harmful industrial chemicals. The user of one from the fabric The garment manufactured according to the invention will continue protected against the pathological effects already mentioned.

It should be noted that the invention provides extremely good pathological protection for a large number can be obtained from industrial fields of application, since the additive (s) everywhere in the sara-th Thickness of the base material and the coating are in place.

The invention is explained in more detail below with the aid of examples, with a number of specific examples Layered materials as well as their use in the manufacture of fabrics, especially in form of work gloves, is referred to.

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loo.oo Parts loo.oo It 3.75 It 0.80 It 0.80 ti o, 4o It

example 1

A mixture for. produced a liquid layer material. The quantities are parts by weight.

I.C.I. "Corvic" 63 / 5o P.V.C. polymer

Tricresyl phosphate calcium stearate dispersion I.C.I. "Monolite" Fast Black BS I.C.I. "Valcafor" Fast Orange G3 I.C.I. "Valcafor" Fast Red M.S.

"irgasan" DP.Joo ·. 2.00 "

The mixture is prepared in a horizontal Beken duplex mixer, type 794 o47. First of all, with the mixer at a standstill, all components with the exception of the plasticizer are mixed up. (Tricresyl phosphate) entered. About 66 parts of the plasticizer are then added. The mixer is started and allowed to run for 15 minutes, after which it is switched off. During the standstill, the rest of the plasticizer is added slowly and steadily over a period of 12-15 minutes. The mixer is then restarted and allowed to run for an hour.

This layer material is used to manufacture work gloves on the basis of fabric

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a knitted or knitted cotton interlock base fabric or a lining that is held by a hand-shaped former immersed in the mixture for an appropriate length of time with fingers pointing down. The form giver will then pulled out and allowed to drip or dry with fingers still pointing downwards. The designer is then flipped over so fingers are pointing up for another appropriate period of time and then in this assembly is moved through an oven, maintaining the temperature of the oven at 215.6 ° C. The designer remains in the oven for a period of time necessary to achieve a suitable curing ΒμΒΓβΙοίιί.

The temperature of the mixture should be kept constant at such a temperature that a uniform however, only partial penetration of the liner occurs. The elevated temperature of the lining is exposed in the oven to make the layer material durable, flexible and impermeable, should be reached quickly in order to establish that the Penetration only remains partial.

After exiting the oven and subsequent cooling, the finished glove is stripped off the former. This glove became a piece of cloth.

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cut off and checked in a laboratory test, which on American Association Test Method 662 ^ p 90-1965 of Tyte Culture Collection is based. It turned out that the non-impregnated fabric and the coating have significantly higher antimicrobial properties as a piece of coated fabric cut from a glove, which was cut in the same manner except that the sheet material mixture did not contain "irgasan" DP.500.

Example 2

The liquid layer material mixture is made from the following components:

ICI "Corvic" P65 / 50 PVC polymer loo.oo parts dialphanyl phthalate ¹ 90.00 "

Chlorinated paraffin 2o, ooo "

Calcium stearate 3.00 ^M

Pigment 0 dyes in the same

Proportions as in example 1) 2.00 "

"ESTABEX" ABF 2.00 "

The blending process and the manufacturing process for the glove are as in Example 1. It becomes a obtained similar result. It should be noted that 2o parts of the cheap chlorinated paraffin are used, about the expensive plasticizer. Di-alphanyl phthalate too "stretch".

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Example 3

■ The liquid material mixture is made up of the following components:

I.C.I. "Corvic" P65 / 50 P.V.C. Polymer loo.oo parts Dialphanyl phthalate 9 ° °° "

oil thinner E.43, available from
Burmah

.Castrol Ltd. of England 2o.oo "

Calcium stearate 3 oο "

"Estabex" ABP 2.oo "

Pigment (3 dyes in the same

Proportions as in example 1) 3 · οο "

The method of blending and the method of making the glove are described in Example 1. Again a similar result is obtained. As in Example 2, the expensive plasticizer is replaced by the oil diluent
E.43 "stretched" which is a relatively inexpensive hydrocarbon oil.

Example 4

The liquid layer material mixture is made of the
the following components:

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ICI "Corvic" Ρβ5 / 5ο Ρ.VC polymer "Breon" PI50 / I PVC polymer, available from BP Chemicals Ltd., England ICI "Corvic" D75 / lo PVC polymer trixylyl phosphate
Butyl benzyl phthalate
Calcium stearate

Pigment (;? Dyes in the same

Proportions as in example 1)

oil thinner E.8l, available from B.P. Chemicals Ltd., England

IRGASAN DP.500

4o, ooo parts

Jo.00 30.00 60.00 45.00 2.00

2.00

8:00 pm "

2.00

The method of mixing, as well as the method of manufacture of the glove are again as described in Example 1. Again, a cheap plasticizer "extender" used. Similar results are obtained.

Example 5

The liquid layer material mixture has the same composition as in Example 1, with the exception that the content of IRGASAN DP ^ oo is reduced to 1.0 parts and 1 part Estabex ABP is added.

The method of mixing, as well as the method of manufacture of the glove are as described above.

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Similar results are obtained.

As already mentioned, the gloves produced according to the preceding examples were tested according to the test procedure 66233 90-1965 of the American Association of Tyte Culture Collection tested. The results for the gloves according to the invention as well as for a control glove are listed in the table below.

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Glove

Examined surface

Staphylococcus aureus

Escherichia
Oo II

Proteus

Vulgaris

Control glove fabric without antimilcrobial Additive coating

Halo growth 0 + 0 +

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Halo Growth Halo Growth + 0 + + 0 +

Glove after
example 1 tissue
Coating 6th
6 - 3
3 7th
7th Glove after
Example 2 tissue
Coating VJl VJl 3
3 " 6th
6th Glove after
Example 3 tissue
Coating 4th
4th 6th
5 5 -
- p «ι Glove after
Example 4 tissue
Coating VJl VJl 3
3 6th
6th Glove after
Example 5 tissue
Coating 6th
6th in in 6th
6th

CO

O N) OO CD

As a number of industrial groups maintenance and Repair departments have the gloves generally once during their period of use for reasons For safety and hygiene reasons, it is desirable that the gloves have the antimicrobial properties of the Invention remain somewhat preserved during such cleaning treatments.

Gloves made according to all examples were subjected to two sequential cleaning procedures followed by the procedure of the International Standards Organization. Technical Committee TC / ⁰ A - "Personal Safety Protective Clothing and Equipment" proposed.

All gloves maintained an acceptable antimicrobial standard. Case in point of that test results obtained is reproduced below.

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Glove

Examined surface

Staphylococcus aureus

Escherichia Oo II

Proteus Vulgaris

Halo growth

Halo growth halo growth

Unwashed
Glove after
example 1

Fabric coating

7 7

Washed glove according to example 1

Fabric coating

4th
3

2 1.75

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CO CD NO OO CD Ca>

In the accompanying drawings, FIG. 1 shows a glove 1 and pig made according to the invention. 2

a section through the production of the in Pig. The glove shown I used fabric on a greatly enlarged scale. As can be seen from FIG. 2, the fabric consists of a soiled or woven base material 2, which is equipped with a coating 3 of durable, flexible, impermeable material. The coating material only partially penetrated the base material.

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Claims (12)

Claims 1. A method for the production of a fabric or fabric in the form of length goods or items of clothing, in particular Gloves made from a flexible absorbent textile with a layer of a permanent flexible impermeable material equipped base material is marked by the steps of applying a layer material containing at least one antimicrobial additive on one side of the base material and the subsequent conversion of the layer material into a permanent one flexible form, wherein the base material is only partially impregnated with the liquid layer material will. 2. The method according to claim 1, characterized in that the or each antimicrobial additive at 20 ⁰ C has a saturation vapor pressure between 2.5 χ 10 ~ ° and 5 * 5 ^x 10 ~ mm / Hg and a generally linear over a considerable temperature range Addiction between log-, ρ and 1 , where ρ is the ^xo T + 2; 5o Saturation vapor pressure and T is the temperature of the additive and the gradient of this dependence - 1 409831/1031 Curve in the range between -2850 and -248ο. 3. The method according to claim 2, characterized in that an additive is used which has a saturation vapor pressure of 4, ο χ lo ~ mm / Hg at 20 ⁰ C, the relevant curve gradient -3170 in the range of loo - 250 ⁰ C. . 4. The method according to claim 1, characterized by the steps of applying the layer material to one side of the base material, wherein the sliding. t _T material is liquid, but can be converted into a permanent, flexible impermeable form by exposing it to an elevated temperature for a certain time, the introduction of at least one antimicrobial additive into the layer material before the same is applied to the base material, the additive at 20 C a saturation vapor pressure between 2.5 χ Io and 5 * 5 x Io mm / Hg and a generally linear dependence between 1Og ₁ ρ and 1 with the above meanings for ρ and T Jo τ + ^ o and the above value for the gradient range, as well as the conversion of the liquid layer material into the permanent flexible impermeable shape. 409831/1031 5. The method according to claim 4, characterized in that there is an additive with a Saturation vapor pressure of 4, ο χ lo "mm / Hg at 20 ° C and a related curve gradient of -5170 is used. o. Method according to one of Claims 1 to 5 * characterized in that the base material is a knitted fabric. 7. The method according to any one of claims 1 to 6, characterized in that the layer material consists essentially of a polyvinyl chloride material. 8. The method according to any one of claims 1 to 7 *, characterized in that the additive used individually or in a mixture lo, Io ^! -Oxybisphenoxarsine used. 9. The method according to any one of claims 1 to 7 *, characterized in that there is used as an additive individually or in a mixture 2, 4, V-trichloro-2-hydroxydiphenyl ether. 10. Process for the manufacture of a glove, Z eke η η ζ eic η η et through the production of the The same substance according to one of the methods of claims 1 to 9. 11. Fabric or fabric produced according to one of the methods of claims 1 to 9 · 12. glove made from the fabric of claim 11, ? * ϋ 9 ίί Vi / ^! Π 3 1