DD140437A1 - METHOD FOR THE PRODUCTION OF DAEMMENDING WEAKMACHER-CONTAINING POLYVINYL CHLORIDE FLOOR SURFACES - Google Patents

Abstract

The method relates to the production of inhibiting, plasticized polyvinyl chloride floor coverings, which in particular have heat and soundproofing properties. The aim is to be able to produce with the lowest possible expenditure on equipment an improved in its shrinkage properties and in the scratch behavior coating, which is also largely resistant to microorganisms. The object is achieved in that prefabricated layers are connected so firmly in a process that a daemmender polyvinyl chloride flooring is formed. For this purpose, at least two layers, consisting of at least one soft polyvinyl chloride foam film with a thickness of 1 to 4 mm and a compact polyvinyl chloride flexible film, are concealed on rotating heated cylinders under pressure. The invention may find application for the production of flächchen daemmenden, prefabricated polyvinyl chloride floor coverings.

Description

209 197-1-

Title of the invention

Process for the preparation of insulating plasticized polyvinyl chloride floor coverings

Field of application of the invention

The invention relates to a process for the preparation of insulating plasticized polyvinyl chloride floor coverings with heat and sound insulating and trittelastischen properties.

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Characteristic of the known technical solutions

Are known processes for the production of heat and sound insulating floor coverings, which are characterized in that is applied to a textile carrier plasticizer-containing polyvinyl chloride in one or more coating operations by means of rollers or doctor blade system. After each coating process, a separate gelation by the action of heat is required (DE-OS 24o8683).

The disadvantage here is the high energy consumption, the requirement of the use of pastable polyvinyl chloride types and a high expenditure on equipment. In application of the products, the very high proportion of plasticizer due to the process has a negative effect on shrinkage and scratch resistance behavior. The use of textile fabrics increases the susceptibility to microbial decomposition (floor, wall and ceiling 3/69, p. 172-179). It is also known that asbestos-containing carriers can be used instead of the textlien carrier. This has the disadvantage that when resuming the products after use harmful effects can not be excluded (floor, wall and ceiling 11/75 p 38-41, floor, wall and ceiling 3/76 p 9).

It is possible to produce a carrierless, but also heat-shielding and skin-scarf de η coating by using only polyvinyl chloride pastes in succession to form the insulating coating. The paste application is made by means of a coating process, whereby after each coating operation a separate gelling of the pastes in the gelling channel is required. This is associated with the need in particular the pastes for the Erstbestrich because of multiple thermal stress with z. B. expensive organotin stabilization systems.

In this case, the required equipment is particularly high. The requirements for the tolerance range to the temperature control are very high, since even small deviations lead to notable quality deterioration (DE-AS 1629612). -

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In the mentioned methods, the working speeds are relatively low. · The use of printing processes with brilliant decoration reproduction, ζ. Β · The gravure printing process is limited because either mark structures of the substrate or additional process steps are necessary.

Due to the Mehrfachbestrich and the required Gelierkanäle results in a very long system that requires a large proportion of construction.

Object of the invention

The aim of the invention is to obtain insulating plasticized polyvinyl chloride floor covering with heat and sound insulating and trittelastischen properties with improved shrinkage behavior and scratch properties, with a low expenditure on apparatus is.notwendig and a product is obtained by the combination of suitable materials that are not susceptible against microbial decomposition. There is no high requirement for the tolerance width of the temperature control of the connection process.

It is also an object of the invention to make the compound der.einzelnen layers so that no damage to the foam structure occurs by the thermal stress with simultaneous application of pressure.

Explanation of the nature of the invention

- The technical task:

The invention has for its object to develop a method for producing insulating plasticized polyvinyl chloride floor coverings according to known calendering or coating method, wherein a plurality of layers are joined together and the respective layer structure is made to eliminate a respective separate gelation and the insulating plasticizer-containing Polyvinyl chloride floor coverings with low equipment costs with high scratch resistance and

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low shrinkage behavior. Features of the invention

The object is achieved in that at least two layers, consisting of at least one soft polyvinyl chloride foam sheet and a compact polyvinyl chloride soft film, which is optionally filled, at a momentary acting pressure of o, 9 to 3.2 JVIPa, at a mass temperature of 333 to 393 K, preferably 353 to 318 K, and a surface temperature of 363 K to 413 K, preferably 383 to 398 K, on rotating heated cylinders at a Yerweilzeit of 3 to 2o lake, preferably 4 to 9 see , And a printing time of o, 5 to 1.5 see, preferably o, 8 - 1.2 see, are welded together over the entire surface.

The polyvinyl chloride soft foam sheet may be in different. Strengths, for example 1 to 4 mm, and in different densities, for example o, 2 to 8 g / cm ^ come used. As compact polyvinyl chloride soft films, those which are patterned by a variety of methods, as well as transparent, unpatterned filled films, may be used in a thickness of, for example, 0.1 to 1.0 mm as near-the-root layers.

In the erfindungsgeniäßen production of insulating Bodenbe 'läge, it is expedient to connect up to four layers over the entire surface. The bonding of the layers takes place according to the invention in a simple procedure by prefabricated polyvinyl chloride soft films are supplied to the prefabricated foam layer of unwinding a continuously operating rotating heated cylinder according to known calendering and coating processes. Before welding with polyvinyl chloride soft films, which optionally contain fillers, a superficial heating of the films with infrared Heisstrahlern done.

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The advantage of the method lies in the fact that a insulating floor covering is obtained which is low in shrinkage and relatively scratch-resistant. Furthermore, the inventive method of producing the insulating plasticized polyvinyl chloride floor coverings, the thermal load of the individual layers, especially the foam layer, which occurs in known methods by the jeweil.mehrfache gelation »off. It is surprising that the prefabricated foam sheet is only so slightly stressed in the pressure and temperature effects set forth according to the invention that no appreciable reduction in thickness and no destruction of the foam structure occurs. Another surprising fact is that in the relatively short exposure times of max. 2o see such a strong compound occurs that the layers of each other are virtually impossible to separate. , ·

Embodiments Example 1

A foam sheet with a thickness of 2.5 mm, serving of

3 o, 4 g / cnr and a tensile strength of 1.96 ICPa is heated by a unwinding the continuously operating. Cylinder supplied (preheat 9 see). Before welding with the first polyvinyl chloride soft sheeting containing the filler

3 in a thickness of o, 5 mm, a density of 1.55 g / cm and a tensile strength of 17.9 MPa is a superficial heating of both films by means of infrared radiant heaters to a temperature of 393 Eo The welding takes place at a pressure of 2.1 MPa by a impression roller at a pressure of o, 9 see and a melt temperature of 37o Iv. This composite of two films is in a similar procedure, another film, also in a thickness of o, 5 mm, in a density

3 ·

of 1.55 g / cirr and a tensile strength of 17.9 MPa laminated under Hitae- and pressing action.

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The insulating floor covering obtained using the method according to the invention is characterized by the following quality parameters ameter:

Thickness (mm) '3,4

Stepping protection (dB) 2o Attention (mm) o, 4

• Separation strength (mm) ο

Thermal conductivity () 0.08

Example 2

A foam sheet with a thickness of 2.5 mm, a density of o, 4 g / cm and a. Tensile strength of 1 ", 96 IViPa is supplied from an unwinding device to the continuously operating heated cylinder (preheat time 6 seconds) before welding with the first polyvinyl chloride soft sheeting containing the print pattern to a thickness of 0.3 mm, a density of l, 5o g / cnr and a tensile strength of 16, ο MPa, the superficial heating by means of infrared radiant heaters to 373 K. The welding takes place at a pressure of 2 MPa by a impression roller at a Druckeinwirkzeit of o, 6 see "and a melt temperature of 353 K. This polyamide composite is laminated in an analogous manner, likewise with a thickness of 3.0 mm, which is not filled, with a density of 1.330 g / cm and a tensile strength of 26.6% IvIPa. The insulating floor covering obtained using the method according to the invention is characterized by the following quality parameters:

Thickness (mm) · 3 _} o '"

• Impact soundproofing improvement (dB) 18 ·

Indentation behavior (mm). o, 45 Separation resistance (mm) ο

Thermal conductivity (r- ^ ~ f) 0.08

Claims (1)

-? - 209 197 invention claim A process for the preparation of insulating plasticized polyvinyl chloride floor coverings by bonding at least two layers, consisting of at least one soft polyvinyl chloride foam sheet, and a compact soft PVC sheet, which is »optionally filled, characterized in that the layers at a brief-acting pressure of o, 9 to 3.2 MPa, at a melt temperature of 333 to 39.3 K, preferably 353 to 378 K, and a surface temperature of 363 to 413 K, 'preferably 383 to 398 K, on rotating heated cylinders with a residence time of 3 to 2o see, preferably 4 to 8 see, and a printing time of o, 5 to 1.5 see, preferably o, 8 to 1.2 see, are welded over the entire surface,