Down

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Daunen Wärmeisolation

Why do down have very good heat-insulating properties?

The quilt and the filling themselves do not keep the body warm. The feathers and down make sure that the heat of the body does not disappear, i. e. they store the heat.
 
Down are significantly lighter than feathers. With the same weight they offer a much larger volume. Due to their three-dimensional structure like a flake down are able to store large amounts of air which is not a good heat conductor. The countless air-filled buffers make up the high capacity in terms of heat insulation.
The quilt and the filling themselves do not keep the body warm. The feathers and down make sure that the heat of the body does not disappear, i. e. they store the heat.
 
Down are significantly lighter than feathers. With the same weight they offer a much larger volume. Due to their three-dimensional structure like a flake down are able to store large amounts of air which is not a good heat conductor. The countless air-filled buffers make up the high capacity in terms of heat insulation.
In contrast to the feather, the down is multi-dimensional. Due to its three-dimensional structure and the ability to continuously recover its original shape, a down traps large amounts of air in proportion to its weight.
 
Air is not a good heat conductor. This property works for instance with double glazed windows and cavity bricks to the effect that air forms a protective buffer from cold.
 
A good down filling contains about 2 millions of interweaved and fluffy barbs. Hence, a layer of air is formed which is a poor heat conductor and protects from cold. Due to their resiliency down can be crushed or compressed. If they are thoroughly fluffed up, they will quickly recover their old shape.
 
Daunen Füllung

Are there synthetic down available in the market?

The term “synthetic down“ is an improper, misleading invention and must not be used in advertisements for bedding products.
 
According to a decision by the Provincial High Court of Appeal in Stuttgart, Germany, it is illegitimate to use the term “synthetic down“ in advertisements for bedding products. The Federal Court did not accept the appeal of the defendant.
The term “synthetic down“ is an improper, misleading invention and must not be used in advertisements for bedding products.
 
According to a decision by the Provincial High Court of Appeal in Stuttgart, Germany, it is illegitimate to use the term “synthetic down“ in advertisements for bedding products. The Federal Court did not accept the appeal of the defendant. (OLG Stuttgart (Provincial High Court of Appeal in Stuttgart) 2 U 86/99 - BGH, decision dated 21st September 2000, 1 ZR 287/99)
 
The court stated that the use of the specification “synthetic down“ is a consumer deception. Since the term “down“ has always been used to label a top-quality natural product, you could get the impression that “synthetic down” are natural down which have been treated with additives. In fact, in the case of the matter of dispute, the material contained 100 % of high-bulk polyester hollow fibres and did not offer any of the essential characteristics of natural down deriving from waterfowl.
 
As we have been informed by the associations of manufacturers of down-and feather-filled bedding products, synthetic-filled products have not acquired the properties of down, so far. Therefore, in future the consumer can take it that only those products may be labelled as down that really deserve it, that is to say incomparable top-quality natural products.
 
For this reason the term “down“ combined with the term “synthetic“ is deceptive, since it suggests to the consumer that synthetic material is similar to down which is a product of nature.
Also in the future, the consumer can expect that only pure down which earn the reputation, that is to say the top-quality unique product of nature, may be labelled as down.
 
Further information at DOWNAPEDIA:
Federn Daunen

Are white down or feathers better than coloured ones?

No. The shade of a down or a feather tells nothing about its quality. The most expensive down, the eiderduck down, has a dark brown colour.
 

Further information at:

No. The shade of a down or a feather tells nothing about its quality. The most expensive down, the eiderduck down, has a dark brown colour.
 

Further information at:

Federn Daunen Füllung

How are down and feathers processed into bedding articles?

The raw down and feathers must be processed before they may be used as filling material for bedding articles.
First of all, the raw down and feathers are cleaned of coarse dirt. Then they are placed in special washing machines and undergo 6 to 8 washing cycles using a specific detergent suitable for bedfeathers.
The raw down and feathers must be processed before they may be used as filling material for bedding articles.
First of all, the raw down and feathers are cleaned of coarse dirt. Then they are placed in special washing machines and undergo 6 to 8 washing cycles using a specific detergent suitable for bedfeathers.
 
In a next step, the down and feathers are dried and sterilized in a steamer at temperatures exceeding 100 °C.
After the drying process they are placed in the dedusting machine to remove fine dust which has not yet been cleared during the washing cycles and are cooled down to normal temperature.
Finally, the down and feathers are sorted. The basic types obtained from sorting are used to confect special down and feather blends according to the customer´s order.
 

The requirements for the hygienic state of the filling material are specified in EN 12935. The Daunasan® / Downafresh® brand indicates that bedding articles labelled with this brand are consistently monitored by means of mystery shopping to ensure at the best that products labelled with Daunasan® / Downafresh® meet the hygiene requirements.

Further information at :

 

Federn Daunen Füllung

How can down and feathers be sorted?

In the separation process down and feathers are sorted with the aid of air which is blown into a special sorting machine consisting of three or four chambers. The airflow generated in the machine achieves that due to gravity the single components fly different distances. The lightest components fly the longest distance and the heaviest elements fly the shortest distance. Correspondingly, the lightest parts, i. e. the down, fly the longest distance and get into the posterior chamber whereas the heaviest parts, i. e.
In the separation process down and feathers are sorted with the aid of air which is blown into a special sorting machine consisting of three or four chambers. The airflow generated in the machine achieves that due to gravity the single components fly different distances. The lightest components fly the longest distance and the heaviest elements fly the shortest distance. Correspondingly, the lightest parts, i. e. the down, fly the longest distance and get into the posterior chamber whereas the heaviest parts, i. e. the feathers, do not get any farther than the first chamber.
 
The different components can be separated by varying the intensity of the airflow.
 
Federn Daunen Füllung Vorteile von Daunen- und Federbetten

What blends of down and feathers are most suitable?

The appropriate blend depends in particular on the individual need for warmth when asleep. Nowadays, most people usually prefer a high percentage of down.
 
Lightweight down provide best fill power values and a high degree of thermal insulation. With a higher percentage of feathers, the weight of the duvets increases, because feathers are heavier than down.
 
Due to large fill power values down are capable of being able to keep the body warm without much weight, that is to say the bulking capacity.
The appropriate blend depends in particular on the individual need for warmth when asleep. Nowadays, most people usually prefer a high percentage of down.
 
Lightweight down provide best fill power values and a high degree of thermal insulation. With a higher percentage of feathers, the weight of the duvets increases, because feathers are heavier than down.
 
Due to large fill power values down are capable of being able to keep the body warm without much weight, that is to say the bulking capacity. A down-filled duvet always contains a blend of down and insulating air-filled pockets. The air-pockets among the single down make the duvet lightweight in relation to its volume. Thus, a down-filled duvet can keep the body warm and comfortable with very little weight.
 
Therefore, down satisfy all requirements for a perfect sleeping comfort: They are light and assure an excellent climate regulation. Pleasant warmth is quickly created and the perspiration absorbed is steadily being eliminated.
 
There are different types of down-filled duvets available. Depending on the filling weight they are manufactured for summer or winter.
Especially, a duvet containing 100 % of down keeps the sleeper pleasantly warm and cosy with very little weight at the same time. Another favoured blend consists of 90 % down and 10 % feathers.
Pillows, however, require a filling material which is able to support the head. In this case, feather-down blends are preferred, but more and more people, however, prefer a soft down-filled pillow.

 

Further information at :

 

Federn Daunen Decken Vorteile von Daunen- und Federbetten

Down duvet and feather duvet – what are the differences?

As stipulated in the European standard EN 13186, duvets with a down content of at least 60% may be labelled as down duvet. Duvets with a down content below 60% are labelled as feather duvets.
 
As stipulated in the European standard EN 13186, duvets with a down content of at least 60% may be labelled as down duvet. Duvets with a down content below 60% are labelled as feather duvets.
 
Federn Daunen Füllgutkennzeichnung DIN EN 12934

How can a half down turn into 85 % feathers and 15 % down? Is this a decline in quality?

No. The formerly labelled denominations such as feathery down, three-quarters down and half down trace back to the previous German RAL-regulation 092 A2 which has meanwhile been replaced by the European standard EN 12934.
The proportion of down and / or feathers is now indicated in weight percentage. EN 12934 does not contain any misleading denominations such as for instance half down etc. 
 
The standard simply prescribes new labelling requirements.
No. The formerly labelled denominations such as feathery down, three-quarters down and half down trace back to the previous German RAL-regulation 092 A2 which has meanwhile been replaced by the European standard EN 12934.
The proportion of down and / or feathers is now indicated in weight percentage. EN 12934 does not contain any misleading denominations such as for instance half down etc. 
 
The standard simply prescribes new labelling requirements. As a matter of course, a filling composition like the former half down still exists. According to the standard such fillings are labelled now as: 85 % feathers, 15 % down. (In fact “half down” contained only 15 % down).
 
Another example for labelling according to the new standard:

“70 % feathers, 30 % down” – this labelling example corresponds to the denomination “three quarters down“ specified in the RAL -regulation which has meanwhile been withdrawn.

Further information at :

Federn Daunen Federngewinnung

Which are the characteristic features of feathers and down from poultry?

 
Feathers and down from waterfowl (geese and ducks) are a unique natural resource of high quality. Used as filling for quilts, pillows and clothing, this material is distinguished by qualities such as breathability, humidity transport and thermal insulation together with a low weight.
 
Feathers and down from waterfowl (geese and ducks) are a unique natural resource of high quality. Used as filling for quilts, pillows and clothing, this material is distinguished by qualities such as breathability, humidity transport and thermal insulation together with a low weight. These special features account for the homogeneous distribution of feathers and down, for instance, in a quilt as well as for the fact that already small amounts of feathers and down are sufficient for the filling of a quilt.
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Federn Daunen

What is the difference between down and feathers

The structure and appearance of down and feathers are quite different. A down has a soft centre from which all the light fluffy filaments protrude. Feathers have a long and curved quill which makes them resilient in a way, at the same time providing them with the ability to expand back to their original shape after having been exposed to pressure. Thus, in contrast to down feathers are perfectly suited as filling material for pillows as they softly cushion the head at the same time supporting the neck as desired.

The structure and appearance of down and feathers are quite different. A down has a soft centre from which all the light fluffy filaments protrude. Feathers have a long and curved quill which makes them resilient in a way, at the same time providing them with the ability to expand back to their original shape after having been exposed to pressure. Thus, in contrast to down feathers are perfectly suited as filling material for pillows as they softly cushion the head at the same time supporting the neck as desired.

On the other hand, down are used as filling material for down duvets ensuring opti-mum thermal insulation and rapid decrease in humidity (climate of the bed hollow). Thereby, down are pleasantly light and very resilient.


However, there is one important thing to consider: Duvets and pillows should be fluffed up in the morning to retain their shape for a long time