An electromagnetic welding method for pre-laid anti-adhesive waterproof membrane

Abstract

The invention discloses an electromagnetic welding method for pre-laid anti-adhesive waterproof coiled material. The pre-laid waterproof coiled material includes a base material layer made of polyethylene, including: 1) matching the pre-welded waterproof coiled material with the pre-paved waterproof coiled material The gasket is fixed on the substrate, and the gasket is composed of a matrix resin layer and a metal wire inlaid on the upper surface of the matrix resin layer; in terms of mass percentage, the raw materials of the matrix resin layer include: polyethylene 5-30%, polyethylene Propylene 5-30%, ethylene-propylene copolymer 20-50% and ethylene-octene copolymer 20-50%; 2) Lay the pre-laid waterproof membrane on the substrate, so that the pre-laid waterproof membrane and the gasket are attached Then align the electromagnetic welding torch and press it on the pre-laid waterproof membrane at the position of the gasket, and start welding. The invention can quickly fix the pre-laid waterproof membrane on the substrate, and the operation is simple and controllable. It has good performance and firm welding, and also avoids the problem of later leakage caused by nailing and other fixing methods in the prior art.

Description

technical field

[0001] The invention belongs to the field of pre-paved anti-adhesive waterproof coiled material, and in particular relates to an electromagnetic welding method for pre-paved anti-adhesive waterproof coiled material. Background technique

[0002] The existing pre-paved anti-adhesive coil facade fixing method is to nail directly on the surface of the coil, but the steel nail penetrates the main body of the coil, which will cause a great leakage hidden danger to the waterproof layer in the later stage, which is not conducive to high requirements for waterproofing construction environment. After further improvement of the construction process, the operator has to heat the contact surface between the back of the pre-laid anti-adhesive coil and the ordinary PE or PP gasket through hand-held hot air welding. However, the actual operation is difficult, and the plasticity temperature range is narrow, which has extremely high requirements on the fluctuation range of t...

Examples

Embodiment 1

[0036] This embodiment provides an electromagnetic welding method for a pre-laid anti-adhesive waterproof membrane, the pre-laid waterproof membrane includes a substrate layer made of polyethylene, and the electromagnetic welding method includes the following steps:

[0037] (1) Fix the pre-welded gasket matched with the pre-laid waterproof membrane to the tunnel arch wall through screws, wherein the gasket is made of a matrix resin layer and embedded on the upper surface of the matrix resin layer Consisting of metal wire; in terms of mass percentage, the raw materials of the matrix resin layer include: polyethylene 10%, polypropylene 15%, ethylene-propylene copolymer 50% and ethylene-octene copolymer 25%, the The matrix resin layer is made by blending, melting and extruding the components in its raw materials;

[0038] Wherein, the middle part of the base resin layer has an inwardly recessed limiting and fixing part, and the middle part of the limiting and fixing part has a s...

Embodiment 2

[0051] This embodiment provides an electromagnetic welding method for pre-laying anti-adhesive waterproof coiled materials, which is basically the same as that of Embodiment 1, the only difference being that in terms of mass percentage, the raw materials of the matrix resin layer include: polyethylene 10%, polyethylene 20% propylene, 40% ethylene-propylene copolymer and 30% ethylene-octene copolymer, the welding time is 1.5s.

[0052] Performance test: The measured bonding strength between the gasket and the pre-paved anti-adhesive waterproof membrane is 5.25N / mm, and the joint shear strength is 12.32N / mm.

Embodiment 3

[0054] This embodiment provides an electromagnetic welding method for pre-laid anti-adhesive waterproof coiled material, which is basically the same as that of Embodiment 1, the only difference being that in terms of mass percentage, the raw materials of the base resin layer include: polyethylene 12%, polyethylene Propylene 18%, ethylene-propylene copolymer 45% and ethylene-octene copolymer 25%, welding time is 1.2s.

[0055] Performance test: The measured bonding strength between the gasket and the pre-paved anti-adhesive waterproof membrane is 4.45N / mm, and the seam shear strength is 11.64N / mm.

technical field

[0001] The invention belongs to the field of pre-paved anti-adhesive waterproof coiled material, and in particular relates to an electromagnetic welding method for pre-paved anti-adhesive waterproof coiled material. Background technique

[0002] The existing pre-paved anti-adhesive coil facade fixing method is to nail directly on the surface of the coil, but the steel nail penetrates the main body of the coil, which will cause a great leakage hidden danger to the waterproof layer in the later stage, which is not conducive to high requirements for waterproofing construction environment. After further improvement of the construction process, the operator has to heat the contact surface between the back of the pre-laid anti-adhesive coil and the ordinary PE or PP gasket through hand-held hot air welding. However, the actual operation is difficult, and the plasticity temperature range is narrow, which has extremely high requirements on the fluctuation range of t...

Examples

Embodiment 1

[0036] This embodiment provides an electromagnetic welding method for a pre-laid anti-adhesive waterproof membrane, the pre-laid waterproof membrane includes a substrate layer made of polyethylene, and the electromagnetic welding method includes the following steps:

[0037] (1) Fix the pre-welded gasket matched with the pre-laid waterproof membrane to the tunnel arch wall through screws, wherein the gasket is made of a matrix resin layer and embedded on the upper surface of the matrix resin layer Consisting of metal wire; in terms of mass percentage, the raw materials of the matrix resin layer include: polyethylene 10%, polypropylene 15%, ethylene-propylene copolymer 50% and ethylene-octene copolymer 25%, the The matrix resin layer is made by blending, melting and extruding the components in its raw materials;

[0038] Wherein, the middle part of the base resin layer has an inwardly recessed limiting and fixing part, and the middle part of the limiting and fixing part has a s...

Embodiment 2

[0051] This embodiment provides an electromagnetic welding method for pre-laying anti-adhesive waterproof coiled materials, which is basically the same as that of Embodiment 1, the only difference being that in terms of mass percentage, the raw materials of the matrix resin layer include: polyethylene 10%, polyethylene 20% propylene, 40% ethylene-propylene copolymer and 30% ethylene-octene copolymer, the welding time is 1.5s.

[0052] Performance test: The measured bonding strength between the gasket and the pre-paved anti-adhesive waterproof membrane is 5.25N / mm, and the joint shear strength is 12.32N / mm.

Embodiment 3

[0054] This embodiment provides an electromagnetic welding method for pre-laid anti-adhesive waterproof coiled material, which is basically the same as that of Embodiment 1, the only difference being that in terms of mass percentage, the raw materials of the base resin layer include: polyethylene 12%, polyethylene Propylene 18%, ethylene-propylene copolymer 45% and ethylene-octene copolymer 25%, welding time is 1.2s.

[0055] Performance test: The measured bonding strength between the gasket and the pre-paved anti-adhesive waterproof membrane is 4.45N / mm, and the seam shear strength is 11.64N / mm.

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