Polymer Processing Research Institute Ltd.

Sekisui Kagaku Kogyo Kabushiki Kaisha

Masaki Matsumoto

Haruhisa Tani

Masahide Yazawa

Yasuo Sasaki

Kazuhiko Kurihara

An improved method for effecting cross-lamination of wide warp and weft webs is provided, wherein a continuous row of cut weft webs having a length corresponding to the width of the warp web to be cross-laminated thereto and arranged in side by side relationship is temporarily prepared on a warp material which is (1) a belt means from which said row of weft webs is transferred onto a warp web in order to be fixed thereto for effecting cross-lamination, (2) a warp web backed up by a belt means from which said row is peeled off in the state loaded on the warp web in order to be fixed thereto for effecting cross-lamination, or (3) a warp web itself to which said row is fixed for effecting cross-lamination, so that the warp material travelling crosswise over the cut weft web at a vertical distance apart therefrom and having been wetted with a liquid having adhesion property to the surface thereof facing said cut weft webs is subjected to successive reciprocating vertical motions so as to touch and pick up the cut weft webs one by one by temporary adhesion to the warp material arranged in side by side relationship, due to the adhesion property of said liquid wetting the surface of the warp material.

Method for producing a cross-laminated cloth-like product from wide warp

A novel product wherein cut webs for wefts (which are abbreviated as weft webs) are successively connected in the warp direction by selvedges adhered onto both the margins of the weft webs, is provided by circulating two right and left heated belts having thereon a hot-melt type adhesive in a tacky state and spaced by the length of each of weft webs of a large width mentioned below; adhering onto each of the belts, selvedge materials which constitute the selvedges of final product and are hereinafter abbreviated merely as selvedges; suddenly dropping the two belts having the selvedges adhered thereonto, on the lower side circulating route of the belts, down onto one of weft webs loaded successively and at a given gap on a conveyer circulating below the belts perpendicularly thereto, over the length corresponding to the width of the weft webs, when both the ends of one of the weft webs and the corresponding belts overlap each other, thereby to adhere both the ends of the weft web onto the corresponding selvedges having said adhesive on their lower surfaces, and just thereafter suddenly elevating the belts thereby to strip and hang up the weft web adhered onto the selvedges from the conveyer; repeating the above-mentioned procedure; and peeling the resulting selvedges having successive weft webs adhered thereonto from the belts to give said novel product.

Method for producing a product comprising weft webs of large width

A stabilized laterally spread reticular web of split fibers is produced by feeding a web of split fibers onto a plurality of belts in side-by-side arrangement on the inlet side thereof, the belts circulating between an inlet-side roller and an outlet-side roller, the advancing route of the belts being planely diverging and the returning route of the belts being planely converging, making the surfaces of at least the belts among the plurality of belts, on which both the side edge parts of the web are placed, wet with a liquid, preferably water containing a small amount of a surfactant, laterally spreading the web on the advancing route of the belts to a given lateral spreading ratio, while temporarily fixing both the side edge parts of the web onto the belts by the surface tension of the liquid, withdrawing the web onto a rotating hot drum through a guide rod, applying suctions to both the side edge parts of the web on the drum, in order to laterally spread slacking side edge parts of the web outwards by the suctions, and drying and heat-treating the laterally spread web while travelling the laterally spread web from one drum to another in a series of several drums, thereby eliminating strains due to the lateral spreading. The resulting web is suitable for producing non-woven fabrics by lamination.

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Tokyo, Japan

Masaki Matsumoto