CS212967B1 - Method of manufacturing inflatable products - Google Patents

Abstract

A method of manufacturing inflatable products, namely pillows, seats, vests and especially mattresses made of textile with a thermoplastic coating on PVC, characterized in that the contact surfaces of the joint between the coating and each other, the coating and the internal partitions and the peripheral tape and the inflatable valve are previously provided with a suitable coating of thermosetting polyurethane, after which the system pre-assembled into the shape of the desired product is heated to a temperature of 110 to 155 °C and compressed with a pressure of 0.45 to 9.8 MPa for 3 to 20 seconds, whereby the glued system is firmly connected in places with a layer of thermosetting adhesive applied. In places where the adhesive is not applied, the system is not connected. The invention solves the simplified production of inflatable products using a coated textile with a thermoplastic coating or directly from foils instead of welded joints, or complex ready-made processing of rubberized textile.

Description

(54) Method of manufacturing inflatable products

Method for producing inflatable products, namely cushions, seats, vests and especially textile mattresses, by thermoplastic coating on PVC, characterized in that the joints between the coating, the coating and the inner partitions and the peripheral tape and the inflation valve are precoated with a thermoreactive coating polyurethane, then the system pre-assembled to the desired product shape is heated to 110-155 ° C and compressed at 0.45-9.8 MPa for 3 to 20 seconds, whereby the bonded assembly is firmly bonded in places with a thermoreactive adhesive layer applied . In areas where the adhesive is not applied, the assembly does not occur.

The invention solves a simplified production of inflatable products using a coated textile with a thermoplastic coating or directly from foils instead of welded or complicated ready-made processing of rubberized textile.

212 967

212 96

BACKGROUND OF THE INVENTION The present invention relates to a process for the manufacture of inflatable articles, in particular mattresses of deposited textile.

In the current production of rubber-textile mattresses, a separating emulsion creates a mattress shape on a inner rubberized layer by means of a rotating drum with a screen printing template. Peripheral lasers and self-formed pre-formed inserts are glued to the unprinted areas forming their own shape. After gluing of the partition walls, circumferential laser tape and valve, rubberized textile is bonded to this part by means of rubber dubbing rollers, which are glued with a rubber layer with the circumferential laser tape with a non-separated edge and glued internal dividing walls. After doubling, the individual mattresses are cut and vulcanized in hot air in a curing boiler.

Another known method of manufacturing is joining the deposited textile to the PVC deposit by means of electrodes, formed into a product shape by high frequency welding.

In this case, two deposited materials are deposited under the metal electrode of the desired shape by depositing one another together by pressure and high frequency heating of the electrode to weld the deposited textiles to the desired shape at the electrode sites.

The first method for the production of rubber deposits requires good tackiness of the mixture, the use of eeparation emulsion, laboriousness in the preparation of the mixture, in the preparation of deposited materials, partition walls, valves, vulcanization and finishing. The second method is simpler, less labor intensive, but technologically demanding in terms of welding technology, electrodes, operator quality, and the limited design of products.

SUMMARY OF THE INVENTION The present invention relates to a process for the production of inflatable articles, in particular mattresses, characterized in that a thermoreactive polyurethane jointing coating is used for joining the coating to and between the base coat and the intermediate and lasso tape, using pressure and temperature.

Example of production of inflatable mattresses with PVC coating

Cotton fabric gets 21/23, metric number 28/1, 34/1 with a weight of 110 g / m 2 in orange color, in a width of 85 cm. The mixture is premixed prior to deposition, and the preplastic is gelled and gelatinized by an extruder. By applying the same mixture, the fabric for the partition walls and the peripheral laso strip is prepared. For this purpose, a cotton fabric having a size of 12/18, a metric of 34/1 having a weight of 100 g / m 2, is used in a desched version. One worry about

n, a 120 g / m 2 PVC coating is applied to a coating roller, to which a 20 g / m 3 polyesterurethane solution having a dry weight of 30% dissolved in acetone is previously applied on a scraper. Apply 10 g / m of thermoreactive polyester-uran solution to the coating of the PVC compound. On the other hand, 1 coat of the auxiliary adhesive rubber coating of a conventional composition with a dry matter content of 40% is applied. The composition of the coating mixture is as follows:

212 967 wt. parts susp. PVC K value 70 wt. parts of DOP mass. DCA parts by weight Epoxi parts

1.5 wt. parts BaCd stabilizer

0.3 wt. Parts Chelétor

0.1 wt. parts of stearic acid

0.7 wt. parts of silica

A polyesterurethane solution is applied to the base fabric with a silk-screen stencil using the silkscreen only, and only the bonding areas are marked in the inner part, and the places where the dividing walls are laid. After evaporation of the solvent from the solution, a laso strip and preformed intermediate walls are placed on the perimeter. A pre-extruded profile with an inflation opening cut into the required length and pre-coated with a polyurethane solution is inserted into the circumference between the two base materials. When pressing, however, a free space must be created in the lower part for the valve location. The topsheet is then applied to each other and the mattress thus formed is pressed at a pressure of 4.5 MPa on a press heated to a press temperature of 145 ° C for 10 seconds. After removing and cooling, after cutting the edge, the air mattress is finished.

The novel manufacturing process can be used for all P7C thermoplastic coatings, thermoplastic polyurethane coatings, various other copolymers and mixtures. It can be applied to inflatable seats, vests, mattresses, boats, water toys, inflatable bags, suction and many other products. For this technology it is possible to use foils or coatings on various textile materials alone. PVC coatings with the addition of isocyanate or polyurethane coatings or crosslinkers can be used to improve the adhesion of the coatings to the textile. Thermo-active polyester polyurethane or polytheurethane solution coatings having a strengthening and curing temperature lower than the melting temperature of the thermoplastic coatings used on the base material can be used as the adhesive adhesive.

Woven, knitted, bonded nonwoven textile materials, both natural and synthetic, can be used as the base materials.

Any type of product can be shaped in a new way with minimal production effort and higher durability and higher physical-mechanical parameters (coating strength, 3GN adhesion per 1 cm width, etc.). For pressure and heat bonding, this technology can be used with multi-stage presses, drum presses, or pressurized air duplicating cylinders and electrically heated in each case with pressure and temperature control.

Claims (1)

OBJECT OF THE INVENTION Method for producing inflatable products, in particular textile mattresses with a thermoplastic non-carrying layer, characterized in that the joints between the non-carrying part and the non-carrying part and the partition walls and circumferential seal and valve are pre-coated with thermoreactive polyurethane. heated by 110 to 155 ° C and pressurized at 0.45 to 9.8 MPa for 3 to 20 seconds.