DE19501433A1 - Use net-like flexible spacer in chemical protective clothing - Google Patents

Abstract

Use of a net like flexible spacer (20) with a thickness of at least 0.5 mm for protective suits against chemicals, lying between an outer layer (10) and an absorbent inner layer (20).

Description

The invention relates to the use of an intermediate layer for protective suits against chemicals.

A protective suit against chemicals is known from DE 43 10 110 A1 lien known. This protective suit consists of an outside layer of a microfiber fabric and an adsorbent Inner layer. Microfibers have the property of being liquid to bind themselves with higher surface tension. For example, rainwater, which is high Has surface tension, not up to the adsorbent Penetrate the inner layer and occupy the adsorber places, which would reduce the filter effect. Behaves differently the microfiber fabric in chemicals with a clot against surface tension, such as. B. Warfare agents. This pene pass through in liquid form through the microfiber fabric to the adsorbent inner layer, which is against liquid chemi no longer offers protection.

The invention has for its object the protective effect of chemical protective suits.

This object is achieved by the features of Claim 1 solved.

The advantage of the invention is that the distance holder the adsorbent inner layer against access protects from liquid chemicals. Because liquid chemicals lien would all adsorber places within a very short time occupy and the protective effect of the adsorbing interior pick up the layer. Due to the at least 0.5 mm thick Ab is guaranteed that chemicals can only be gaseous state up to the adsorbent inner layer long, which provides adequate protection against this danger. The spacer prevents even when outside and  Inner layer to be pressed against each other, the wicking between these layers. In summary, he presented is enough

• - that the protective suits withstand chemicals longer can and
• - That the protective effect of the suit is preserved remains when mechanical pressure is exerted on the outer layer is practiced.

Advantageous embodiments of the invention give the Subclaims 2 to 13.

An embodiment of the invention is described below hand of the drawing described in more detail. The only figure shows the An in the form of a perspective sketch order of the individual layers of a protective suit against Chemicals. This arrangement consists of

• an outer layer 10 which is exposed to the influences of the environment,
• - An intermediate layer in the form of a at least 0.5 mm thick, net-like spacer 20 and
• - An adsorbent inner layer 30 .

The adsorbent inner layer 30 represents a safe barrier against gaseous chemicals, but not against chemical warfare agents, for example. In order to effectively prevent warfare agent in liquid form from reaching the adsorbing inner layer 30 , the spacer 20 is arranged between the outer layer 10 and the inner layer 30 . As a result, the inner layer 30 and the outer layer 10 no longer come into direct contact with one another even when mechanical pressure is exerted on the outer layer. The spacer 20 causes that liquid warfare agent, which has penetrated into the outer layer 10 , for example, by a defective impregnation, must first evaporate in order to get to the inner layer 30 . The gaseous warfare agent is bound there safely. As a result, the spacer 20 prevents wicking between the outer layer 10 and the inner layer 30 .

The thickness of the spacer 20 does not exceed 1.5 mm in order to limit the additional weight due to the additional intermediate layer.

So that the outer layer 10 and the inner layer 30 do not touch even when both layers are pressed against each other, the network of the spacer 20 is specially designed. It is provided that the spacer 20 has webs 21 with a width of 0.5 to 3 mm and openings 22 in between of 1 to 15 mm 2.

The spacer 20 is a knitted fabric and therefore highly flexible and light. Such spacers 20 do not limit the comfort of the protective suit.

If the knitwear consists predominantly of aramid, the spacer 20 has a high chemical resistance and a high temperature resistance. These properties are required both in use and for the subsequent decontamination of the protective suits.

A spacer 20 is particularly suitable for knitted suits

• - a weight per unit area of 300 to 400 g / m²;
• - 12 to 20 openings 22 per 10 cm in the longitudinal direction;
• - 16 to 24 openings 22 per 10 cm in the transverse direction;
• - 2 to 12 mm² openings 22 .

Because of the spacer 20, there is no need for a water vapor-permeable, water-blocking plastic layer both in the outer layer 10 and in the inner layer 30 . It is sufficient if the outer layer 10 is impregnated to repel liquids. The absence of a plastic layer increases the breathability of the protective suit. Furthermore, the protective suit can be thermally detoxified without damage after use.

In order to be able to reuse the protective suit more often and detoxify it more easily, it is made up of two parts and consists of an inner suit and an outer suit. The inner suit consists of the inner layer 30 and the spacer 20 fastened thereon and is first put on. The outer suit, which consists of the outer layer 10, is put on. Thanks to the modular design, the inner suit and outer suit can be individually detoxified after one use. For example, the outer suit can be treated separately with a solvent-containing impregnating agent without the adsorber spaces of the inner suit being occupied thereby.

In order not to interrupt the barrier effect of the spacer 20 by fastening means, the spacer 20 is only sewn to the openings for feet, hands and head on the inner layer 30 .

Reference list

10 outer layer
20 spacers
21 bridge
22 opening
30 inner layer

Claims (13)

1. Use of a net-like, flexible spacer ( 20 ) with a thickness of at least 0.5 mm for protective suits against chemicals to be arranged between

• - An outer layer ( 10 ) and
• - An adsorbent inner layer ( 30 ).

2. Use according to claim 1, wherein the thickness of the spacer ( 20 ) does not exceed 1.5 mm. 3. Use according to claim 1 or 2, in which the network-like spacer ( 20 ) from webs ( 21 ) with a width of 0.5-3 mm and intermediate openings ( 22 ) of 1-15 mm² is formed. 4. Use according to claim 1, wherein the spacer ( 20 ) is a knitted fabric. 5. Use according to claim 4, wherein the knitted fabric consists mainly of aramid.   6. Use according to claim 4 or 5, wherein the stitches would have a basis weight of 300 to 400 g / m². 7. Use according to one of claims 4 to 6, in which the knitted fabric in the longitudinal direction has 12 to 20 openings ( 22 ) per 10 cm. 8. Use according to one of claims 4 to 7, in which the knitted fabric in the transverse direction has 16 to 24 openings ( 22 ) per 10 cm. 9. Use according to one of claims 4 to 8, wherein the openings ( 22 ) have an area of 2 to 12 mm² sen. 10. Use according to one of claims 1 to 9, wherein the outer layer ( 10 ) has no water-blocking, water vapor-permeable plastic layer. 11. Use according to one of claims 1 to 10, wherein the inner layer ( 30 ) has no water-blocking, water vapor-permeable plastic layer. 12. Use according to one of claims 1 to 11, in which

• - Form inner layer ( 30 ) and outer layer ( 10 ) separately to be put on parts of the protective suit, and
• - The spacer ( 20 ) is attached to the inner layer ( 30 ).

13. Use according to claim 12, wherein the spacer ( 20 ) with the inner layer ( 30 ) is sewn to the openings for feet, hands and head.