DK150214B - ROLL OF COAT-SHAPED MATERIAL - Google Patents

Description

15021Λ i

The invention relates to a roll of web-shaped material, e.g. paper, plastic film, fabric or similar material, rolled up on an inner core integrally with the roll material and consisting of a plurality of turns of said material held relative to each other by means of a binder.

A roll of this kind is known from German Patent Specification No. 817,192, which describes a process for making such a roll. In the manufacture of the roll, the first turns of the material to be rolled are joined together by means of a binder to form an inner sleeve or core on which the remaining material is wound.

The roll according to the invention differs from the known in that the binder is adapted to bind said windings with a strength less than the strength of the web-shaped material against tearing.

Hereby it is achieved that all the material used for the core can be rolled off again without the risk of being torn over and that in such a rolling down, no core remains. This can further result in savings over the prior art roll due to less material consumption, and any possible cost of disposal of the core falling away.

The invention will be explained in more detail below by means of an exemplary embodiment.

Rolls of web-shaped material consisting of creped paper must be made with so-called open center hole. The paper must be rolled into a core in the inside of the roll. According to the invention, this core is to be integrally formed with the material on this rolled material and consists of a number of turns thereof, which turns are fixed relative to each other. To this end, the starting end of the 2,120,214 crepe paper web is laid in a conventional manner around a preferably expandable reel spindle which is caused to rotate while the first, innermost turns of the reel are fixed relative to each other so that a reel core is constructed. Coils are fixed with water or with a mixture of water and a binder, e.g. starch, CMC, PVA or other water-soluble binder in concentrations between 0.05-2% depending on the effect of the desired bond.

10 If the binder or fixer is made up of water alone, the amount thereof should be kept so low that the paper web does not moisten.

Conveniently, the binder or fixing agent is applied to the side of the web which does not have direct contact with the reel spindle, and if the fixing agent is a binder mixed in water, the viscosity should be kept so low as to obtain a good and even spread.

The fixing agent can be applied in a variety of ways, e.g. by spraying or ironing 20 on the web or by means of a printing press, glue press or other mechanism which provides an appropriate pattern of spreading on and in the web. With such application of the fixing agent, the amount of the agent can be adjusted so that the paper in the core of the roll remains virtually unaffected from a point of view.

Practical tests with starch as a fixing agent in connection with webs of creped paper have achieved good results, without the inner paper windings forming the core of the rolls being directly glued.

Optionally, heating or cooling may also be included in the work operations in the construction of the roller core.

In the manufacture of rolls of other web-shaped materials 35 are selected for the fixing of their cores