DE1460111A1 - Thermoplastically shaped hat made of woven or knitted fabric made of fully synthetic material - Google Patents

Description

FARBENFABRIKEN BAYER AG

LEVERKU SEN-Bayerwerk ST / H Pajent-Abteilimg IjJ. June 1962

Thermoplastically shaped hat made of woven or knitted fabric made of fully synthetic material

The present invention relates in particular to thermoplastically formed hats made from woven or knitted fully synthetic materials Materials. The hats have particularly advantageous properties.

It is already known to make thermoformed hats made from fabrics made of fully synthetic materials, such as vinyl chloride polymer threads, to manufacture. These hats have the advantage that they are in one operation by thermoplastic deformation in very

can be produced in a rational manner. In addition, the hats are given by the heat treatment during the deformation process

the rigidity necessary for stability.

At the same time, however, such hats also have a number of disadvantages. They are not dimensionally accurate enough at the temperatures they are worn. This is especially true in the event that they left lying for example in the car exposed to the sun a long time

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will. In such cases, greater shrinkage occurs. Furthermore, despite the sufficient rigidity, they are insufficient elastic. They also do not allow the shape to be adjusted, e.g. when treated with steam. So it is not possible to add a special trick or some other slight deformation in the hat afterwards. The look this hat is plastic or film-like. This is also seen as a disadvantage.

It is also known to make thermoformed hats made of fully synthetic To equip material to increase the dimensional accuracy and to improve the grip with plastic resins.

But these hats also have various disadvantages. Although the dimensional accuracy is quite good, it is not satisfactory absolutely. The reason for this is to be seen in the fact that the Using hard paints can achieve good dimensional stability, but at the same time the handle is too hard. The rigidity is therefore sufficiently high, but the elasticity is too low. at the use of soft varnishes gives a good grip, but the dimensional accuracy is then much lower. At the same time, the stiffness is too low, while the elastic -

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With this St-aBd der Te-clanik oaofa bribes as before for a stat., #er at the same time absolute üaüialtitelt at in question taraeratea temperatuipeiij, a good grip, Elasticity IB ^ Steifneit lanÄ a textiles, nieiit ai ^ sr Substance-like aiissefe-eia indicates that the zaidean is in a "work." gang established «earth came.

Let it be mm. gp £ imd & a ₉ that a thermally formed Bufc aias tissue © # er © ewlrte aias TQllsjnatäaä & tlselieffl material mar daaan ^ ie before ^ aaats® ^ eluaft, if the tissue is eating. SenrlrliB mi 5® - SS) Ji aaas Äas iaesteht, the aatae Ac] rylnitrilp @ Ll ^ "eri" afeKa ibaer®eBtellt ßinä. vmn to 5 © - 10 II bestefat from such fibers, which stiffen them when heated, from therffl © pl & stl®eihÄia. P © lyineren are made «for the

suitable ^ ieh teesöBäiers igut Poiyamidfaeern,

It is to be called eajas ^ ßpröiciaäeaa afeerraae & eaad that raaa in the v "er« Rei! Iji "ua3g ßer erfltaaiaaagSageJigiBen tissue ijnd Oetfisfee hat diar-cia yaereoplasfciiSielaie '¥ arf m ° mmg can get the

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has the properties mentioned above. It could not be foreseen that at one and the same drawing temperature both the acrylic fibers are thermally deformable while retaining their textile character and at the same time the polyamide fibers are also deformable assuming elastic stiffening. When a tissue is deformed, which exclusively consists of aeryl fibers, you only get a blank hat that has a textile appearance, but no rigidity. If you use a fabric that consists exclusively of polyamide fibers, you get a hat blank with sufficient Stiffness, however, the appearance is decidedly plastic-like.

Only when the woven or knitted fabrics according to the invention are used, you get a hat that is dimensionally stable, sufficiently elastic, sufficiently stiff, has a good grip, does not look like plastic and can also be produced in one operation. There is a special advantage of this hat in that it can also be colored bicolor because of its content of two different fibers.

For the production of the hat according to the invention, the usual Woven and knitted fabrics can be used. You can use fiberglass or from threads or from F & sergitmen uqad

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exist. The fiber yarns themselves can in turn be mixed fiber yarns, i.e. both acrylic fibers and the stiffening fibers contain, or fiber yarns that only contain fibers of the same type.

The fabrics can also be made up of different types of threads, which on the one hand consist of acrylonitrile polymers, on the other hand made of self-stiffening polymers.

Acrylonitrile polymers with more than 80 % bound acrylonitrile are preferably used as acrylonitrile polymers. These polymers are therefore the polymers customarily used for fiber production ".

The second type of fiber is characterized in that the fibers experience stiffening when heated and that they consist of thermoplastic polymers. In particular, polyamides such as polyamide 6, polyamide 66, but also the other fiber-forming polyamides are suitable for this. It is also possible to use vinyl chloride polymers, vinyl chloride polymers and polyolefins, for example polyethylene and polypropylene, but also polyesters. '.

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The fabrics according to the invention contain between 50 and 90 wt. #, Preferably 70 and 80 wt. #, Of acrylonitrile polymer fibers. The content of stiffening fibers is accordingly between 50-10 wt. #, Or ^ O - 20 wt.

The production of the hat according to the invention is carried out using the. special woven or knitted fabrics made according to the usual methods of thermoplastic deformation. Enclose this the following procedural steps:

1) cutting the piece,

2) heating the fabric to a temperature at which it can be stretched, e.g. to a temperature between 200 and 250 °. The heating can be done e.g. by infrared radiation or by heating plates.

3) Removal of the heated piece and immediate warping on the cold mold,

4) removing the piece from the cold mold and

5) Tailoring the hat, i.e. processing the edge and attaching the hat and leather straps.

By choosing the composition of the fiber mixture, one can adjust the elasticity on the one hand and the stiffness on the other hand vary widely. The greater the content of acrylonitrile polymer fibers, the lower the stiffness.

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In order to obtain dyed hats, use “on fabrics or knitted fabrics which have been dyed in fiber aisle yarn or as such. Both fillings have the advantage of the Bieolor coloring because of the different types of fibers. In order to achieve special effects, it is also possible to equip the hat with synthetic resins such as isocyanate-based resins. By taking action, it can, in particular, reduce the problem and, under certain conditions, improve it.

The invention is particularly in view of the foregoing Manufacture of hats described. However, erf can be found in ~ production vessel also produce other articles which are the same Must have properties as they are for the hats in detail have been set out. These articles include e.g. Corsetry, such as brassiere, molded upholstery fabrics Tops.

To make a hat, a straw-colored fabric made of a mixed yarn Nm 20/2, which consists of 70% acrylic lnitiri iserlymerized fibers 5/60 and 50% of polyeaprola dew fibers 2> 5 / € 0 is used. The acrylic fiber is light beige in color, wah

the polyamide fiber is colored light brown. The staining was efenr Gfewefee carried out as a Bleolor stain.

ctein 8ew © be windows are cut out, which on one? heated between heating plates to about 230 °

The molded fabric is cold formed into an ifet y ^ Htotrofeling is taken away, his hand is worked and his hat is handled is provided with ribbon and leather. He shows everyone \ B € firteilteaft®a properties.

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Claims (4)

Patent claims: Γΐ)) Thermoplastically shaped fabrics * e.g. hats, made of woven or knitted fabric made of fully synthetic material, characterized in that the woven or knitted fabric consists of 50-90% fibers made from acrylonitrile polymers and 50-10% such fibers consists> which stiffen when heated and are made of thermoplastic polymers. 2) Thermoplastically shaped sheet-like structure according to claim 1, characterized in that the woven or knitted fabric is 59.-from Consists of polyamide fibers. 3) Thermoplastically shaped sheet-like structure according to claim 1 and 2, characterized in that they are equipped with a plastic resin. 4) Thermoplastically shaped sheet-like structure according to claims 1-3? characterized in that they are colored bicolor. Le A 7379 80 98 1 1/00 69