JP2003528227A - Process, machine and hot melt materials for bonding multiple fibers - Google Patents

Abstract

(57) Abstract: A very thin hot melt layer (1X) is supported and carried by one layer (3) of two fibers (3, 15), with the fiber (3) supporting and having it. From the surface opposite to contact, heat until the entire thickness of the layer (1X) has been plasticized; another fiber (15) is carried to the first fiber and the two fibers (3, 15) are pressed together.

Description

Detailed Description of the Invention

TECHNICAL FIELD Using an adhesive in the form of a layer of expanded polyurethane (foam or equivalent),
It is known to bond two fibers by a two-step process using equipment, as illustrated in FIGS. After the first heating unit 9 heats the surface of the layer 1 which comes into contact with the fibers 3, said layer 1 inserts one of the two fibers 3 to be bonded between the cylinder 5 and the roller 7. Sent. The fibers 3 are then conveyed to the second cylinder 11 together with the layer 1 to which they are adhered, whereas the second fibers 1
Due to the subsequent adhesion of 5, the opposite surface of layer 1 is plasticized, which is done in this second stage by means of the passage between the second cylinder 11 and the roller 17 feeding the second fibers 15. For this adhesive system, a two-stage and two surface plasticization procedure (particularly that of flame or hot-air type), in which a relatively thick layer or sheet of expanded polyurethane is sandwiched The two fibers are melted together in order to bond them together. The finished product is a relatively hard fiber, which is produced by a relatively very thick layer of adhesive 1 and two continuous passages across two heating units 9 and 13.

Background of the Invention Another facility can use various sets of products, which are modified polyolefin-based films made by Sarna Xiro (D and CH); self made by Vegam (I). Adhesive polymer; Griltex (made by ECM-Chemie (CH)
(Registered trademark) products; polyolefins made by Bemis (UK), polyamides, etc .; and others. These adhesive films are used as adhesives by the following methods: The film is inserted between two fibers and heat is applied to at least one of the fibers until the fibers reach the temperature required for melting or decomposition of the material. The fibers are attached by pressing between two cylinders of the calender type via. This system can cause damage to heated fibers (not all fibers can withstand high temperatures), in which case also relatively stiff double fibers are produced. It is not possible to bond relatively thick fibers.

The present invention obviates the aforementioned problems and achieves other objects and advantages which will become apparent from the description below.

DISCLOSURE OF THE INVENTION An object of the present invention is a process for joining two layers or similar products with a hot melt layer (as described above), which comprises a very thin expanded polyurethane hot melt layer or One of the films is used; one of the fibers supports and holds the hot melt layer; the hot melt layer supports the hot melt layer until the total thickness of the layer is plasticized. And is heated from the surface opposite the surface in contact with the holding fiber; and another fiber is fed therefor and the two fibers are pressed together. Heating can be accomplished by thermal or hot air heating means or otherwise depending on the hot melt material used and / or the other environment.

When a thin layer of expanded polyurethane or another expanded product is used, the hot melt material can be used with another powder, paste or spray adhesive to increase adhesion and resistance to flaking. it can. The supplemental adhesives can be dispensed as follows. The hot melt is placed on the first fiber before the heating means, which also acts on the adhesive; it is placed on the surface of the first fiber before the hot melt is placed so that the adhesive passes through the hot melt. Either heated or placed on the second fiber to prevent heating means from acting on the adhesive.

The invention also relates to a machine for adhering two fibers or similar products with a hot melt layer, which cools a first fiber of two fibers and a very thin hot melt layer together. Hot melt layer until the layer is brought into contact with the fibers in such a way that the layer is promoted to combine with the fibers in such a way that it further acts on the hot melt layer. Is provided with a heating means for plasticizing the whole thickness thereof, and a means for carrying the second fiber to the plasticized hot melt layer in contact with the first fiber and pressing the two fibers.

The heating means are arranged such that they act on the advancing cylinder, in which the first fibers holding the hot melt layer are arranged, and immediately after the heating means in relation to the advancing operation, the second fibers are plasticized. There is a roller or similar type of means for carrying to the hot melt layer.

The machine may be of the type with two cylinder and roller pairs.
In this case, the first cylinder and the first roller interact so that the first fiber and the hot melt layer are both cooled; the first fiber supporting the hot melt layer orbits the second cylinder; heating means Acting on the second cylinder; a second roller interacts with the cylinder on the second stage, carrying the second fiber to the first fiber, pressing the two fibers and adhering them together. To interact with the second cylinder.

Further, since the machine conveys the first fiber and the hot melt layer together in a cooled state,
A first fiber, comprising an interacting cylinder and a first roller, supporting a hot melt layer, orbits said cylinder; passes through a second roller interacting with said cylinder; after said heating means, a second roller Interacts with the cylinder,
Carry the second fiber up to the first fiber and press the two fibers together to bond them.

If an adhesive needs to be added to the hot melt layer, a device of known type can be advantageously deposited in a small amount in the open surface cells of the expanded hot melt. Provision may be made for adding adhesive powder and / or paste.

To summarize, the proposed process involves placing a polyester, polyamide or polyurethane and polyethylene foam or film sheet, or web on a first fiber and heat melting; It consists of carrying one fiber and binding them together by pressing them between two cylinders of the calender type. In fact, the entire hot melt layer, such as an expanded polyurethane sort, is melted and adheres directly with the two fibers sandwiched. Thus, the same results as before are achieved by using about half the thickness of hot melt (polyurethane or otherwise) that has been used to date and by a single heating unit.

Thin layers of expanded polyurethane have not previously been used for adhesion,
It was used in other fields such as quilts or other products and manufacturing.

The proposed hot melt adhesive melting process, unlike the traditional methods of high temperature calendering, can also be used to bond very heavy fibers and is required to pass through the fiber layers. High temperatures tend to have a beneficial effect on fiber characteristics.

According to the present invention, one or both of the fibers may have a thermoplastic product within the fiber structure, or even as a result of a coating or resin impregnation treatment, but the bonding may occur between the two fibers.

The present invention provides, inter alia: A1-saving of brazing material since good adhesion is obtained using only half the amount of product currently used; A2-much faster than current operating speeds Saves time because it achieves operating speed; A3-Manufacture of adhesive products with improved characteristics of softness, feel and fall, especially with regard to wearable fibers; A4-Dry clean or wash according to international standard, excellent Use of adhesive with results;

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will become more apparent from the accompanying drawings and description showing practical embodiments without limiting the invention.

In FIGS. 4 and 5, the components of the machine are matched to the same reference numerals used in the conventional solution shown in FIGS.

A modified example is configured by removing the first heating means 9, and the hot melt layer 1X is arranged on the first fiber 3 in a cooled state and supported by the first fiber for the second cylinder 11. There, the hot melt layer is influenced by the heating means 13 near the roller 17 and is fed with the second fibers 15 and goes around the roller 17. The hot melt layer, indicated by 1X in FIGS. 4 and 5, is very thin, so that the heating means 13 acting on it, practically the entire thickness of said layer 1X, by the heating provided by the heating means 13, Only the surface that is in contact with the fibers 3 that is affected to a very small extent is melted, and the heating means 13 does not raise the temperature of the first fibers 3 so much by the strength of the heating, and the very thin hot Melt layer 1X
Can act directly on. Immediately after the thin hot melt layer 1X has melted, the second fibers 15 are carried over to the melted or plasticized material of the layer 1X, the two fibers 3 and 15 of the calender 11 and the guide 17. When subjected to a calendering action between them, the thin layers 1X are adhered by the hot melt material.

According to this configuration, a single heating means indicated by reference numeral 13 is used, and FIG.
And the use of the first heating means, indicated by reference numeral 9 in FIG. 2, is not required. It is possible to use a very thin layer of eg expanded polyurethane or another hot melt layer, for example a very thin cut film or foam (one of the types from the prototype shown above), which receives the layer from the cylinder 5. Because the fibers 3 provide the transport capacity and transport the fibers to the treatment area where the heating means are located; the possible thickness of the hot melt layer as indicated by 1X is per unit of surface area. Has the advantage of saving (relatively expensive) hot melt material, which leads to a reduction in the amount of hot melt used for, which offers the advantages of flexibility, softness and lightness to the fibers to be bonded. Therefore, it can be used not only as a heavy upholstery material, but also in a very good condition as a wearable fabric.

FIG. 6 shows a modification of the conventional structure in which the solution means shown in FIGS. 4 and 5 is modified. In this variation, a single cylinder 111 (equal to cylinder 11), a roller 115 for supplying hot melt 101X equal to 1X (roller 115 is equivalent to cylinder 5), and a roller 107 for supplying fiber 3 are provided.
, And a single heating means 113 (equal to the means 13) and a roller 117 equal to the roller 17 for feeding the fibers 15. According to this solution, the structure of the machine is simple and therefore the overall size of the machine is smaller than the size of the conventional machine of FIGS. 1 to 3 and the size of FIG. 4 modified according to the invention.

FIGS. 7, 8 and 9 show three schematic views of the machine, in which a powder, paste or spray type supplemental adhesive is applied to a thin layer of expanding hot metal. A normal sprinkler type powder dispenser can be installed. A cylinder type dispenser equipped with a scraper cell can be used to add a pasty supplemental adhesive. A spray dispenser can also be provided.

7, 8 and 9 show the solution in the form of a machine, which is provided with a supplementary adhesive-dispensing device. In these solutions, the components 205, 207,
Reference numerals 211, 213, 217 correspond to the components 5, 7, 11, 13, 17 in the schematic diagram. FIG. 7 shows an adhesive dispensing device 220 for applying the adhesive acted by the heating means 213 to the hot melt 1Y arranged on the first fibers 3. In the variant of FIG. 8, the adhesive is dispensed on the fibers 1 by the dispenser 222 before the hot melt 1Y is placed on the fibers; in this case the adhesive is exposed to the heating means via the hot melt. . If the supplemental adhesive is not exposed to the action of the heating means, the dispensing device 224 is arranged as shown in FIG. 9 to dispense the adhesive to the second fiber 15 and heat the hot melt. And after the area to be melted, it comes into contact with the hot melt.

It is understood that the drawings show only one example showing only the practical operation of the present invention, and that the present invention can be bought in the shape and the configuration within the scope of the basic principle of the present invention. Will be done. Any reference signs in the appended claims are intended for the purpose of facilitating the understanding of the claims with reference to the regulations and drawings, and are not intended to limit the scope of protection shown in the claims.

[Brief description of drawings]

[Figure 1]   The conventional solution shown above.

[Fig. 2]   The conventional solution shown above.

[Figure 3]   The conventional solution shown above.

FIG. 4 is an adaptation of the known type of machine shown in FIGS. 1 to 3, modified to be able to carry out the proposed process.

[Figure 5]   FIG. 5 is an enlarged detailed view of FIG. 4.

[Figure 6]   A simplified example of a machine that implements the proposed process.

[Figure 7]   A solution for adding adhesive to hot melts.

[Figure 8]   A solution for adding adhesive to hot melts.

[Figure 9]   A solution for adding adhesive to hot melts.

[Procedure for Amendment] Submission for translation of Article 34 Amendment of Patent Cooperation Treaty

[Submission date] February 19, 2002 (2002.2.19)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Contents of correction]

[Claims]

─────────────────────────────────────────────────── ─── Continued front page    (81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, I T, LU, MC, NL, PT, SE, TR), OA (BF , BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, G M, KE, LS, MW, MZ, SD, SL, SZ, TZ , UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, B Z, CA, CH, CN, CR, CU, CZ, DE, DK , DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, J P, KE, KG, KP, KR, KZ, LC, LK, LR , LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, R O, RU, SD, SE, SG, SI, SK, SL, TJ , TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW F-term (reference) 4F100 AK51C BA03 BA06 BA10A                       BA10B CB03C DG00A DG00B                       EA00 EJ422                 4F211 AD05 AD08 AG03 AH17 AH46                       TA04 TC21 TH02 TH06 TH09                       TH18 TN25 TN31 TN65 TQ03                 4L032 AA05 AA06 AA07 AB01 AC02                       BA09 BD01 BD03 CA03

Claims (16)

[Claims] 1. Utilizing a very thin hot melt material in the process of adhering two fibers or similar products with a hot melt layer; the first fiber supporting and holding the hot melt layer in the cold state. Heating the hot melt layer from a surface opposite to the surface supporting and having the fibers in contact therewith until the total thickness of the layer has plasticized; and a second fiber. Carrying the two fibers to the first fiber and pressing the two fibers against each other; 2. Process according to claim 1, characterized in that the heating is carried out by thermal power. 3. Process according to claim 1, characterized in that the heating is carried out by hot air. 4. An additional adhesive in the form of powder and / or paste and / or spray is added to a layer of expanded polyurethane or another hot melt product with an additional adhesive. The process of paragraph 1. 5. Process according to claim 4, characterized in that the supplementary adhesive is dispensed on the hotmelt which is arranged on the first fibers before the heating zone. 6. The process of claim 4, wherein the supplemental adhesive is dispensed on the surface of the first fiber before the hot melt is placed on the first product. 7. Process according to claim 4, characterized in that the supplementary adhesive is dispensed on the second fibres. 8. A machine for adhering two fibers or similar products with a hot melt layer, the first fiber (3) of the two fibers (3, 15) in such a way as to advance said layer with said fibers. And means (5, 7; 111, 115) for carrying the very thin hot melt layer (1X; 101X) together in a cooled state; and the hot melt layer (1X;
101X) and heating means (12; 113) for plasticizing the hot melt layer until its surface contacts the first fiber (3); and the plasticized hot melt layer is the first fiber (3). ) And a means (11, 17; 111, 117) for carrying the second fiber (15) and pressing the two fibers (3, 15) until it comes into contact with the machine. . 9. The heating means (13; 113) comprises a hot melt layer (1X;
Advancement cylinder (11; 111) in which the first fiber (3) with 101X) is placed
) For acting towards the), immediately after the heating means (13; 113) in relation to the forward movement, roller means (17) for conveying the second fiber to the plasticized hot melt layer. The machine according to claim 8, characterized in that there is an equivalent means. 10. A first roller (7) and a first cylinder (11) interacting to carry the first fiber (3) and the hot melt layer (1X) together in the cold state.
A cylinder (11) instead of a first fiber (3) supporting a hot melt layer around the circumference; and a heating means (13) acting toward the second cylinder (11).
And; after the heating means (13), in order to carry the second fiber (15) to the first fiber, interact with the second cylinder and press the two fibers to bond them, Machine according to claim 8 or 9, characterized in that it comprises a second roller (17) interacting with a second cylinder (11). 11. A hot melt layer comprising a first roller (115) and a cylinder (111) which interact to carry the first fiber (3) and the hot melt layer (101X) in a cooled state. A first fiber (3) supporting (101X) goes around the cylinder (111); and a heating means (113) acting toward the cylinder (111); and after the heating means (113), Second fiber (1
Carrying 5) to the first fiber (3), pressing the two fibers and adhering them, a second roller (117) interacting with the cylinder (111);
The machine according to claim 8 or 9, comprising: 12. Machine according to any one of claims 8 to 11, characterized in that it comprises a device for adding supplementary adhesive in the form of powder and / or paste and / or spray. 13. The device of claim 13, wherein the device is positioned to dispense a supplemental adhesive over the surface of the first fiber prior to placing the hot melt on the first fiber. Machine. 14. The machine of claim 13 wherein the device is positioned to dispense supplemental adhesive over the second fiber. 15. One of the materials, such as a web of cut type or a sheet of foam or film, made of polyester, polyamide, polyurethane or polyethylene, is used as the hot melt layer. Item 15. The process according to any one of items 1 to 14. 16. A process for adhering two fibers or similar products with a hot melt layer, characterized in that it is as a whole as described above and as illustrated by way of example in the accompanying drawings.