KR20040081093A - Tube shape sealing material and a process for preparation thereof - Google Patents

Abstract

PURPOSE: A tube-type sealing material sealing material and its preparation method are provided, to obtain a sealing material which is not effervescent, has suitably low ductility and malleability and can maintain solidity even when charged between the components of structure. CONSTITUTION: The tube-type sealing material comprises a cylindrical or polygonal tube(2) which comprises a thermoplastic synthetic resin and has a hollow(1); and a cohesive and adhesive sealant(3) which is coated on the surface of the tube uniformly. Preferably the thermoplastic synthetic resin is selected from the group consisting of a poly(vinyl chloride) (PVC) resin, a polyethylene (PE) resin, a polypropylene (PP) resin, a polyacryl resin, a poly(vinyl acetate) (PVA) resin, a polystyrene (PS) resin, an acrylonitrile-butadiene-styrene (ABS) resin, a polyamide resin and a polycarbonate resin.

Description

Tube shape sealing material and a process for preparation

The present invention fills the gap between parts of various metal structures, such as vehicles, buildings, and machinery, and seals, seals, and glues the parts to obtain a watertight, airtight, rustproof, and cushioning effect. Or to provide a method of manufacturing a tubular sealing material and a method of manufacturing the sealing material coated with a pressure-sensitive adhesive and adhesive on the circumferential surface to obtain a heat dissipation, heat resistance, sound insulation, sound insulation and heat insulation effect by maintaining a constant gap between the parts.

Sealing materials (fillers) to fill the gaps between parts of various metal structures, including vehicles, to obtain sealing, sealing, adhesion, watertightness, airtightness, rustproofing, shock absorbing, heat dissipation, heat insulation, sound insulation, or sound insulation As a sealant, a composition such as that described in the application number 10-2003-0000397, which is filed by the applicant as of January 03, 2003, is used as a sealant. It is a sealing material made by forming a pillar-shaped sealing material and filling them directly in the gap between structural parts, or a sealing material (filling material) obtained by applying a sealant of the composition on the surface of a cylindrical polyethylene foam as a core material, or currently in foreign countries. Adhesiveness and adhesion to the circumferential surface of the foam foamed in cylinder or mosquito form using imported polyvinyl chloride (PVC) as a raw material It is a sealing material coated with a sealant having a property, or as disclosed in Korean Patent Application Publication No. 10-2004-002534 (Application No. 10-2002-0057273), based on ethylene propylene diemethylene (EPDM) rubber On the surface of the tube foamed in the form of a cylinder or a mosque in its entirety, or in a cylinder or mosque with a hollow in the center, a knitted fabric made of nylon, polyester or aramid yarn is laminated. There is a sealing material which is coated with a sealant having adhesiveness and adhesiveness so as to surround it from above, but the columnar sealing material formed only with the sealant made of the above-described adhesive and sealant composition maintains its adhesiveness and adhesiveness when it is used, but it is too soft It is easy to flow down, and it is difficult to maintain and support the clearance between parts, and the pillar The sealing material of which the sealant of the said sealant composition was apply | coated to the surface made from the type | mold polyethylene foam core material requires the heat resistance which the columnar polyethylene foam used as a core material can withstand in extreme heat conditions of 120 degreeC or more, such as near an equator. When applied to a vehicle, the polyethylene (PE) foam, which is a core material, lacks heat resistance, and melts and flows down at a high temperature of 120 ° C. or higher, so that it does not function as a sealing material. Sealing material, which is coated with adhesive and adhesive sealant, is insufficiently compressed to adequately squeeze the gap between parts of the PVC structure when filling is applied to support the gap. Is too weak or too strong to seal the structure There are drawbacks to application in the gaps between the parts which are difficult to support or difficult to insert into the gaps between the structural parts. Therefore, foams that are suitable for such application conditions are now shaped appropriately as sealing materials and depend only on imports. In addition, even if PVC foam is produced in Korea, foaming agent and other additives must be added to foam the PVC, and the heating conditions for foaming are difficult, which leads to a cost increase due to the complicated manufacturing process and high material consumption. .

In addition, the sealing material obtained by laminating and coating the knitted fabric and the sealant on the foam of the pillar or tube-shaped EPDM described above cannot be used as a sealing material because the ductility and malleability of the EPDM is too strong unless the knitted fabric laminated on the foam surface is used. In addition, the use of knitted fabrics to reinforce the shortcomings requires the use of various kinds of raw materials, and the manufacturing process is complicated and difficult, resulting in cost increase and short-term mass production.

As described above, the present invention provides a cylindrical or molar-type sealing material made of only a sealant made of a tacky composition and a silly material coated with a tacky and adhesive sealant on the surface of a column-shaped polyethylene core, or a columnar PVC foam. Laminating a woven fabric of nylon, polyester, or aramid yarn on the surface of the sealing material or the columnar EPDM foamed body, and then applying the adhesive and adhesive sealant covering the adhesive material. It improves the defects of the sealing materials, so that the ductility and malleability is suitable for use as the sealing material and does not need to be foamed, and it is adhesive and adhesive to the sealing material body directly without the need of laminating the knitted fabric on the surface as a separate reinforcement and then applying the sealant It can be used as a sealing material just by applying a sealant. It has a hollow tube shape, which is easily contracted by compression when applied to the gap between parts of the structure, and has excellent elasticity. It also has excellent adhesion, adhesion, and gap retention roles among the parts. As it uses only PVC and thermoplastic resins, it has the advantage of saving materials and recycling by using simple raw materials.Since only forming a hollow tube without foaming, it is a sealing material that has the effects and features such as reduction of manufacturing cost due to the simplification of the manufacturing process. And, to provide a manufacturing method for easily manufacturing the sealing material, it will be described in detail by way of example with reference to the accompanying drawings as follows.

Figure 1a is a perspective view of one example of a tubular sealing material according to the present invention.

Figure 1b is a perspective view of another example of the tubular sealing material according to the present invention.

Figure 2 is a sectional view of the main portion of the manufacturing apparatus of the tubular sealing material according to the present invention.

Figure 3 is a perspective view of the main portion of the manufacturing apparatus of the tubular sealing material according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: hollow part 2,2 '...: tube

3: sealant 4: release paper

10: screw 20: hopper

30: heater 40: reducer

50: raw material 60: extrusion die

70: inlet 80: outlet

E: Extruder M: Motor

The present invention, polyvinyl chloride resin (PVC), polyethylene resin (PE), polypropylene resin (PP), polyacrylic resin, vinyl acetate resin (PVAc), polystyrene resin (PS), ABS resin, polyamide resin, poly Consists of uniformly applying a sealant (3) having adhesiveness and adhesion to the surface of the tube (2) having a cylindrical or polygonal hollow portion (1) made of any one thermoplastic synthetic resin selected from thermoplastic synthetic resins such as carbonate resin. As a sealing material to be used, this sealing material may be manufactured and protected at the same time as the surface of the release paper 4, and then, when used as a sealing material, the release paper 4 may be removed and applied to the gap between the structural parts.

Since the sealing material of the present invention constituted as described above is a molded product which is made of thermoplastic synthetic resin and is not foamed as a hollow tube (2), the force for maintaining the gap when applied between various structural parts becomes strong, and the gap between structural parts After being filled in, the tube is crimped and pinched in the gaps, resulting in an excellent effect of doubling the adhesion and adhesion between parts by the force to return to a circular shape.

In addition, the sealing material of the present invention is characterized as having a simple manufacturing process as follows.

That is, the raw material 50 for the adhesive and adhesive sealant composition is introduced through the hopper 20 on the top of the extruder while the extruder E having the screw 10 embedded therein and the heater 30 extrapolated to the outer circumferential surface is heated by the heater 30. By rotating the screw 10 by the deceleration operation of the motor M to which the reducer 40 is attached, thereby simultaneously extruding the heated and melted raw material 50 through the extrusion die 60. By supplying a plurality of tubes (2) (2 ') having a hollow portion (1) injection molded into a thermoplastic synthetic resin through the one side inlet 70 of the extrusion die 60 installed at right angles to (E) The tube is passed through the melt sealant 3 discharged to the extrusion die 60 by a screw while the tube 2 passes through the extrusion die 60 while being continuously discharged to the other outlet 80 of the extrusion die 60. (2) is passed through and the sealant (3) is naturally applied to the surface of the tube (2) and the sealant (3) It is easy to obtain a sealing material coated with a sealant 3 having adhesiveness and adhesiveness on the surface of the tube 2 while being easily cured at room temperature.

The tubular sealing material of the present invention configured as described above is not foamable and has low ductility and malleability to a moderate degree, so that the hardness is maintained even when filling between structural parts, and thus the gap of the parts is continuously maintained. The sealing material is filled with the effect of making the adhesion and adhesion of the parts in contact with the extremely good, and also the sealing material manufacturing method of the present invention, while supplying the sealant (3) raw material by the melt extruder (E) thermoplastic synthetic resin tube ( By passing the sealant 3 on the surface of the tube 2 through 2), it is also effective to obtain a sealing material coated with the sealant on the surface of the tube 2 simply and uniformly.

Claims (3)

A tubular sealing material, characterized by uniformly applying a sealant (3) having adhesiveness and adhesion to a surface of a tube (2) having a cylindrical or polygonal hollow portion (1) made of thermoplastic synthetic resin. The method of claim 1, wherein the thermoplastic synthetic resin is polyvinyl chloride resin (PVC), polyethylene resin (PE), polypropylene resin (PP), polyacrylic resin, vinyl acetate resin (PVAc), polystyrene resin (PS), ABS resin And a thermoplastic resin such as polyamide resin and polycarbonate resin. The sealing material of Claim 1 which apply | coated the sealant 3 to the surface of the tube 2, The extruder E with which the screw 10 was built-in and the heater 30 extrapolated to the outer peripheral surface by the heater 30 is carried out. While heating, the raw material 50 for the adhesive and adhesive sealant composition is introduced through the hopper 20 on the extruder to be heated and melted, and at the same time, the screw 10 is operated by the deceleration operation of the motor M to which the reducer 40 is attached. Injection molding into a thermoplastic synthetic resin through the inlet 70 of one side of the extrusion die 60 installed at right angles with the extruder E while continuously extruding the heated and melted raw material 50 through the extrusion die 60 by rotating the The tube 2 is fed into the extrusion die 60 by supplying a plurality of tubes 2 (2 ') ... having a hollow part 1 and continuously exiting to the other outlet 80 of the extrusion die 60. While passing through the tube 2 passes through the melt sealant 3 discharged to the extrusion die 60 by the screw at this time Bracket (2) on the surface sealant (3) and to be naturally applied to the tube (2) the sealant method for producing a tubular sealing member, characterized by (3) is produced by a method that causes hardening easily cooled at room temperature applied to the surface of the.