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Production process of polymer self-adhesive waterproof membrane

A self-adhesive waterproof membrane and production process technology, applied in the direction of layered products, adhesives, adhesive types, etc. Effects of tack and peel strength, simplified dosing system, cost and energy reduction

Active Publication Date: 2015-11-25
QINGDAO KEHUA M M M
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of using a reaction kettle to produce hot-melt pressure-sensitive adhesives are: (1) The amount of feeding is large at one time. Once the process adjustment is wrong, all the rubber materials in the kettle will be scrapped; (2) The stirring shear force of the reaction kettle is small, and only a small molecular weight can be fed. Thermoplastic rubber, high molecular weight thermoplastic rubber cannot be used, so as to improve the performance of hot-melt pressure-sensitive adhesive, such as poor low temperature resistance, narrow use temperature range, etc.; (3) The heating time of the reaction kettle is long, the energy consumption is large, and it is easy to cause thermoplastic rubber to degrade. Reduced performance of hot melt pressure sensitive adhesives
The glue applicator adopts a high-power electric heating glue box, heats and melts the hot-melt pressure-sensitive adhesive block that has been cooled and solidified to become a fluid, and coats the polymer sheet through the coating die head. Heating, high power consumption and high cost; and it is easy to cause degradation of hot-melt pressure-sensitive adhesive, carbon deposition in the heating glue box, affecting the quality of glue coating, and reducing the performance of the self-adhesive layer

Method used

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  • Production process of polymer self-adhesive waterproof membrane
  • Production process of polymer self-adhesive waterproof membrane
  • Production process of polymer self-adhesive waterproof membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0035] like figure 1 As shown, the production process of the polymer self-adhesive waterproof membrane of the present embodiment comprises the following steps:

[0036] Step 1: Mix the thermoplastic rubber, tackifying resin, filler and antioxidant powder evenly, and add them to the feed hopper 2 of the conical twin-screw extruder;

[0037] Step 2: The conical twin-screw extruder is running, and plasticizer is added through the feeding port 3 arranged in the middle section of the conical twin-screw extruder; the middle section of the screw 1 of the conical twin-screw extruder is provided with a reverse mixing thread, The plasticizer and the powder in step 1 are mixed through a conical twin-screw extruder, and the plasticizer is mixed evenly with the powder in step 1; the middle section of screw 1 is 0.25-0.75L (L is the length of the screw) There is a reverse mixing thread at the center, the length of the reverse mixing thread is 0.2-0.4L, the reverse mixing thread ensures tha...

Embodiment 2

[0045] like figure 2 As shown, the present embodiment is the same as embodiment 1 except the following differences:

[0046] Step 3: Use a vacuum exhaust device to perform vacuum exhaust through the vacuum exhaust hole 4 arranged at 0.75-0.85L of the conical twin-screw extruder. The vacuum degree is 0.08MPa;

[0047] Step 4: The hot-melt pressure-sensitive adhesive produced in step 3 passes through the melt metering pump and glue coating die on the head of the conical twin-screw extruder, and the polymer sheet is passed through the sheet extruder and three-roll calendering The production is arranged directly under the coating die, and the hot-melt pressure-sensitive adhesive flows out from the coating die to coat the polymer sheet, and the temperature of the coating die is 180°C.

[0048] The ratio of parts by weight of thermoplastic rubber, tackifying resin, filler, antioxidant and plasticizer is: thermoplastic rubber: 4.5 parts; tackifying resin: 4 parts; filler: 0.4 part;...

Embodiment 3

[0052] This embodiment is the same as embodiment 1 except the following differences:

[0053] Thermoplastic rubber: 2 parts; tackifying resin: 7 parts; filler: 0.5 part; antioxidant: 0.05 part; plasticizer: 1 part;

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Abstract

The invention belongs to the technical field of a production process of a waterproof coiled material and relates to a production process of a polymer self-adhesion waterproof coiled material. Thermoplastic rubber, tackifying resin, fillers and antioxidant powder are uniformly mixed to be added into a conical twin-screw extruder, and plasticizers are uniformly mixed with the powder by virtue of reverse mixing threads formed on the middle section of a screw rod of the conical twin-screw extruder; vacuum exhaust is performed by virtue of a vacuum exhaust hole formed in the position of 0.75 to 0.85 L of the conical twin-screw extruder; polymer sheets are coated with hot-melt pressure-sensitive adhesives by virtue of a melt dosing pump and a coating die head which are arranged on a machine head; the structural design of the conical twin-screw extruder and the screw rod is adopted, so that a feeding system is simplified, and the process control is simple, and a traditional hot-melt pressure-sensitive adhesive production line and a polymer sheet coating production line are merged, so that synchronous online production of the polymer self-adhesion waterproof coiled material is realized, the production process is simplified, and the cost and the energy consumption are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of production technology of waterproof coiled material, and in particular relates to a production process of polymer self-adhesive waterproof coiled material with online gluing. Background technique [0002] Polymer self-adhesive waterproof membrane is composed of polymer sheet (PVC, HDPE, EVA, EPDM, TPO, etc. as raw materials), self-adhesive layer and isolation film, which can be reinforced by composite fabric on the polymer sheet according to needs; The membrane combines the advantages of polymer waterproof membrane and self-adhesive membrane, which greatly improves the properties of puncture resistance, weather resistance, self-healing, high and low temperature resistance, etc., with better physical properties and more stable chemical properties. The new polymer self-adhesive waterproof membrane can be permanently bonded with the concrete structure layer to form a "skin-like" waterproof structure without ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/06B32B27/08B32B27/18B32B25/04B32B25/08B32B37/00C09J145/00C09J157/02C09J153/02C09J11/00
Inventor 王全基杨有财
Owner QINGDAO KEHUA M M M
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