ALPATEC MG 2.1 Bedienungsanleitung PDF herunterladen (Seite 9)

UNITEX nr. 1 - 2014

Core

Polymeric Wall

Fig. 2: microcapsules in detail and on a bre

1.1. THERMIC™ and comfort

The human body is warm-blooded and must maintain

a body temperature within very close limits. It uses

food as a fuel, converting it into energy. Some of this

energy may leave the body through radiation from the

skin or evaporation of sweat during exercise, whilst the

remaining energy is devoted to maintaining the body

core temperature essential for our internal organs.

As the body must produce heat continuously, it must

also lose it at a rate that provides control of body

temperature within those close limits.

Comfort may be regarded both physically and

physiologically as a condition of thermal neutrality

under which the body does not need to reduce or

increase heat loss or gain.

Tests conducted in varying conditions have identied a

thermo-neutral zone, which is dened as the range of

optimum temperatures in which the human body feels

thermally comfortable. Moving away from the thermo-

neutral zone increases the feeling of discomfort.

The ultimate challenge of this technology would be

what is commonly known as a “peak shaver”. It should

cut the peaks of discomfort (either positive or negative).

Textiles containing THERMIC™ react immediately

with changes in environmental temperatures and the

temperatures in different areas of the body.

When a rise in temperature occurs, the PCM

microcapsules react by absorbing heat and storing this

energy in the liqueed phase change materials. When

the temperature falls again, the microcapsules release

this stored heat energy and the phase change materials

solidify again, slowing down the rate of cooling. In this

way THERMIC™ allows the wearer to remain within the

comfort zone for a longer period which contributes to

his thermal comfort.

Fig. 3: heat loss and gain in a human body due to microcapsules

2. Controlled released microcapsules: fragrance

and skin-care compounds

The addition of fragrances to textiles has been carried

out for many years in the form of fabric conditioners

in the wash and during tumble-drying; all are designed

to impart a fresh aroma to the textile. The nose is the

most neglected marketing tool and the most powerful

of our ve senses:

• never rests,

•continuously captures information of our

environment and transmit this to the brain,

• onceidentiﬁed by the brain, our body reacts,

• cancreateverystrong associations,

• canremindusofanimageoranemotion.

However, no matter the quality of the technology

used to impart the fragrance, the effect is relatively

short-lived. Numerous attempts have been made at

adding fragrances directly to bres and fabrics but all

fail to survive one or two wash cycles. Only through

microencapsulation are fragrances able to remain

on a garment during a signicant part of its lifetime.

Microencapsulation of essential oils (as fragrances

or skin-care compounds) has led to many novelty

applications, as garments, but it has also allowed

exposure at home and in the work place to the

benecial effects of aromatherapy.

2.1. eSCENTial™ technology

The eSCENTial reactive technology of the Devan’s

group allows the application of fragrances, vitamins,

moisturisers, reafrming and other kind of skin-care

compounds microcapsules, to all types of textile

substrates, by a reactive system. Depending on

application weights and the wash cycle used, up to

20-25 washes can be achieved without complete loss

of fragrance or active compound. The contents of

the microcapsules are released with light abrasion as

would take place during day-to-day use of the article.

The capsules range in size from 1 to 10 micrometres.

In practice, the smaller the capsules the greater the

covering of the product and the longer the fragrance

will last, as it takes longer for the capsules to be

ruptured by physical pressure.

The Devan’s eSCENTial™ collections can confer

different kind of concepts as Aromatherapy,

Freshness, Pure Nature and Fruity collections as

well as Skin-care components collections.

3. Application of reactive microcapsules to textiles

In most cases, microcapsules need to be inserted

inside a lm (binder) that covers a great part of the

bres. It is a well-known fact that binders have a

negative effect on textile properties. By other hand,

the reactive technology, that involves the application

of patented microcapsules with functional reactive

groups, individually attaches the microcapsules to the

bres and therefore the use of binder is not necessary

and the textile properties remain unchanged:

- breathability is maintained because air and water

vapour can continue to pass through the bre mesh;

- handle is not affected because the bres maintain

their original space to move and slide in one another;

- softness is guaranteed. Devan’s uses very small

microcapsules which penetrate very deep inside

the textile structure leaving the surface almost as in

original state;

- wash resistance.

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