JPS60181352A - Production of fiber laminate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a laminate made of fibrous materials.

As a manufacturing method of this kind of laminate, conventionally, for example, Japanese Patent Publication No.
As shown in the ZZA7 issue, granular solid adhesive, which is a thermosetting synthetic resin, is mixed with a fiber material made from defibrated cut cloth, etc., and after this is formed into a plate shape, solid adhesive is applied using heated air. Methods for melting and solidifying agents are already known. However, in the laminates produced by this method, the molten adhesive cannot wrap around the fibers sufficiently and the bonding range (area) is narrow, resulting in poor bonding properties of the fibers themselves, and the bonding strength between the fibers. This has the disadvantage of weakening and lacking in resilience to compressive loads, or results in large permanent deformation when compressive loads are repeatedly applied.

The present invention has been devised to solve these problems, and its main purpose is to obtain a 1 m fiber laminate with improved elasticity and low permanent deformation at a low cost. In order to achieve this objective, the manufacturing method of the present invention involves uniformly wetting the surface layer of a single filament of a fiber material, such as a fiber or cut cloth, until it can exhibit elasticity by wetting the surface layer of a single filament with a liquid adhesive. After that, this is made into a laminate of a desired thickness, and the liquid adhesive is solidified by the action of high temperature steam.

An embodiment of the present invention will be described below with reference to the drawings.

The figure shows a flow sheet of the manufacturing method according to the present invention, and in the figure, 1 is a hopper feeder, 2 is a mixer provided to communicate with the hot spring (-), 3 is a suction fan provided between them, and 4 is a suction fan installed between them. A liquid adhesive tank connected to the mixer, 5 a conveyor disposed below the outlet of the mixer 2, 6 a fleece manufacturing device provided on the output side of the conveyor, 7 the fleece manufacturing device 8.8 A defibrating cylinder which is disposed inside and has a number of needle teeth protruding from its outer periphery.
9 is a heating device placed on the exit side of the fleece manufacturing device; 1O is a superheated steam blowing vibrator piped inside the heating device; A conveyor for conveyance is disposed within the heating device and on the exit side, and ν indicates a cutter.

According to the present invention, a fibrous material such as cut cloth is put into a hopper feeder 1, finely combed by a mechanism within the hopper feeder, and then transferred to a mixer 2. Inside the mixer, the liquid adhesive is dripped while rotating the stirring blade. As the liquid adhesive, for example, a synthetic rubber-based or urethane-based adhesive resin is used, and the amount added is about 70 to 30 parts per 100 parts of the tI & fiber material in the mixer. In this way, the liquid adhesive is uniformly applied to the surface of the fibrous material in the mixer to an appropriate degree of wetting.The fibrous material is then conveyed to the fleece manufacturing device 6 by the conveyor 5.
Transfer to. In the fleece manufacturing apparatus, the fiber material is defibrated into finer pieces by the defibrating cylinder 7, and then passed through rotating mesh cylinders 8 and 8 to form a plate having a predetermined thickness. This plate-shaped fibrous material is then sprayed with superheated steam within a device on a conveyor 10 to solidify the liquid adhesive in the fibrous material, and then passed through a heating device 9 to dry. The fibrous material that has passed through the heating device is cut into a predetermined length using a cutter.

The characteristics of the fiber laminate produced in this way (the product of the present invention) and the conventional product A7 were compared, and the test data is shown in the table below. Refers to a molded product mixed with granular solid thermoplastic or thermosetting resin adhesive.

The test method is based on JI8, and the table for which detailed explanations are omitted shows that the product of the present invention has a lower apparent density, a higher rebound modulus, and a lower permanent set due to repeated compression than the conventional product. . Here, a low apparent density means that the material is lightweight as long as it has the same thickness, length, and width. The fact that the product of the present invention has such a low apparent density means that even if the amount of fiber used is reduced due to the use of an elastic adhesive, performance superior to that of conventional products can be obtained. In addition, unlike point-adhesive powder adhesives, which have a high rebound modulus, the fiber material itself has increased elasticity because the adhesive is applied over its entire circumferential surface.
This is because the bonding area between the fiber materials is large and the bonding strength is increased accordingly. Furthermore, the reason why the permanent deformation is small is that as a result of the increase in the bonding strength between the fiber materials as described above, the ability to recover from deformation is increased.

In addition, it has high air permeability and excellent hygroscopicity and air permeability, so when the product of the present invention is used as an automobile seat, it provides a comfortable ride that is not found in urethane foam products.

Further, although not shown in the table, sound absorption properties were investigated as another property test, and it was found that the product of the present invention had the best sound absorption performance.

As explained in the examples above, according to the manufacturing method of the present invention, a fiber laminate having excellent elasticity and low permanent deformation can be obtained. The laminate is also lightweight and has excellent sound and moisture absorption properties, so it is expected that it can be used in a variety of applications, such as cushioning materials such as mats and automobile interior materials, depending on the individual characteristics. can.

Another major feature is that, unlike conventional urethane products, it can be manufactured at a lower cost since it uses waste fibers such as cut cloth.

[Brief explanation of drawings]

The figure is a manufacturing flow sheet shown to explain the manufacturing method according to the present invention. Patent Applicant: Howa Textile Industry Co., Ltd. Procedural Amendment (Method) 1. Indication of the case 1982 Patent Application No. 321208 2. Name of the invention Method for manufacturing fiber laminates 3. Person making the amendment Relationship with the case Patent application Person 4, Agent 5, Date of amendment order: May 29, 1980 Contents of amendment■, In the specification, in the second line of page 7, it says "Figure r is" instead of "Figure 1 is". to correct. 2. As shown in red on the attached sheet of drawings, "Figure 1"
and join. that's all

Claims (1)

[Claims] A fibrous material obtained by defibrating fibers, cut cloth, etc. is stirred and mixed so that the liquid adhesive that bonds between the fibers wets the surface layer of each single fiber, and the mixture is then mixed with a large number of needle teeth around the outer periphery. A protruding defibrating cylinder is used to defibrate the fibers into a laminate of a desired thickness, and by passing high temperature steam through the laminate, the liquid adhesive is solidified to form a highly elastic and uniformly bulky fiber laminate. A manufacturing method characterized by manufacturing a body.