Low foamed multi-layer plastic building template and method for manufacturing same

A construction template and low-foaming technology, which is applied to the preparation of building components on site, construction, building construction, etc., can solve problems such as difficulties in recycling, poor quality of boards and adhesives, and difficulties in recycling, so as to benefit Human health, reduce construction costs, improve the effect of comprehensive performance

Inactive Publication Date: 2009-12-30
JIANGSU BAIXIN PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, wooden plywood is widely used, which is light in weight and easy to use, but it is limited to the poor quality of the board and adhesive, and it will be scrapped after 3 to 5 uses, which wastes resources and is difficult to recycle.
Recently, the plastic templates that appear in the construction industry also have many shortcomings. Some have high hardness, poor toughness, brittleness, and are not easy to process, and some are not rigid enough and easy to deform.
Chinese patent 99111262.8 discloses a glass fiber-reinforced low-foaming plastic building formwork, which is based on thermoplastics, added glass fiber, foaming agent and other fillers, and is formed by hot-melt extruding through an extruder to improve the rigidity of the formwork , The number of times of use has reduced the cost and has made significant progress, but there are still the following disadvantages: 1. The formwork is made of the same component and content of the mixture from the outside to the inside, and the rigidity and toughness of the formwork cannot be taken into account at the same time. The overall performance is not good; 2. The formwork is a hollow structure, and the concrete is easy to drill into the cavity when it is used, which is difficult to remove, which brings difficulties to recycling; 3. When it is used for construction at the corners of beams, columns and other components, it is not easy to use convenient
4. The powder produced during the construction and cutting of the mold material will be splashed on the human body and cause itching, which will affect health

Method used

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  • Low foamed multi-layer plastic building template and method for manufacturing same
  • Low foamed multi-layer plastic building template and method for manufacturing same
  • Low foamed multi-layer plastic building template and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Example 1: 60 parts of polyethylene, 35 parts of aluminum hydroxide, and 5 parts of liquid polyisobutylene are stirred and mixed, granulated by a granulator, and sent to 1# plastic extruder; 98 parts of polyethylene, azodicarboxylate 0.3 parts of barium oxide, 0.8 parts of zinc oxide, and 0.9 parts of liquid polyisobutylene are mixed and stirred and sent to 2# plastic extruder. The extruder mixture enters the surface layer, the 2# extruder mixture enters the core layer, and is continuously extruded to form a flat building formwork. The thickness of the surface layer 1 is 0.6mm, and the thickness of the core layer 2 is 13.8mm. After cooling, it is cut according to the specifications. ,like figure 1 .

example 2

[0023] Example 2: Send 78 parts of recycled polypropylene, 21 parts of zinc oxide, and 1 part of low molecular weight paraffin into 1# extruder, and feed 99.7 parts of recycled polypropylene, 0.1 part of azodicarbonamide, 0.1 part of barium oxide, and low molecular weight paraffin into 1# extruder. Measure 0.1 part of paraffin, send it into 2# extruder, the rest of the method is the same as Example 1, and make a flat template, the surface layer 1 is 1.0mm thick, and the core layer 2 is 16mm thick. Before complete cooling, it will be processed by forming a mold and controlling the appropriate temperature. Formwork at right angles, such as figure 2 .

example 3

[0024] Example 3: Send 87 parts of regenerated polyvinyl chloride, 10 parts of magnesium hydroxide, and 3 parts of animal fat into the 1# extruder, and feed 99 parts of regenerated polyvinyl chloride, 0.2 parts of p-toluenesulfonylchlorourea, and 0.3 parts of zinc oxide , 0.5 part of animal fat is sent into 2# extruder, and all the other methods are with example two, are processed into surface layer 1 thick 0.8mm, the groove template of core layer 2 thick 16.4mm, as image 3 .

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Abstract

The invention discloses a low foamed multi-layer plastic building template and a method for manufacturing the same. The building template is used for concrete pouring in building operations. The building template consists of a core layer and surface layers covering both side faces of the core layer; the template is flat-shaped, groove-shaped or right angle-shaped; the surface layers and the core layer both take alkene thermoplastics as a base material, but have different components and contents; and the surface layers contain flame retardant materials, and the core layer contains a foaming agent and a temperature adjusting agent. The manufacturing method comprises the following steps of: adding different raw materials into two extruders, smelting the raw materials and then extruding the raw materials in a layering forming mould at the same time, and manufacturing the flat template by continuous extrusion of the raw materials, or further processing the flat template into the groove-shaped or right angle-shaped template by the forming mould. The surface layers of the template have the advantages of wearing resistance, flame retardation and good toughness; the core layer of the template has the advantages of light weight, good rigidity, overall combination of rigidity and toughness, and reinforced comprehensive performance; moreover, the template has easy demoulding and easy cleaning, and facilitates repeated use of the template and recycling after being out of service.

Description

technical field [0001] The invention relates to a building template for concrete pouring construction, in particular to a low-foaming multi-layer plastic building template, and to a manufacturing method of the template. Background technique [0002] During the construction of buildings, bridges, tunnels and other projects, concrete pouring requires a large number of formwork. Various formworks are also constantly being refurbished, mainly wood formwork, steel formwork, bamboo plywood and so on. At present, wood plywood is widely used, which is light in weight and easy to use, but the quality of the board and the adhesive is poor, and it will be scrapped after being used for 3 to 5 times, which is a waste of resources and difficult to recycle. The plastic formworks that have appeared in the construction industry recently also have many shortcomings. Some have high hardness, poor toughness, are prone to brittleness, and are not easy to process, and some are not rigid enough a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G9/05B29B7/00B29B9/06B29C47/06B29K23/00B29K7/00
Inventor 张锦
Owner JIANGSU BAIXIN PLASTIC IND
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