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Modified polyvinyl chloride (PVC) for producing building template

A building formwork and modification technology, applied in the field of modified PVC, can solve the problems of low strength and low specific gravity

Inactive Publication Date: 2013-01-02
BEIJING AOYU FORMWORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, plastic building templates are mostly made of PP (polypropylene) and PE (polyethylene). PVC (polyvinyl chloride) has a relatively small proportion of existing applications because of its low strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The components in the PVC component are mixed according to the following weight and number ratios to prepare the mixture:

[0018] PVC base material (SG-5 type) 50 parts; calcium carbonate: 10-12 parts; composite lead: 2-3 parts; CPE: 2.5-3.5 parts; ACR: 1-1.5 parts; titanium dioxide: 2.5-3.5 parts; UV-531: 0.15-2.0 parts; polyethylene wax: 0.1-0.2 parts; stearic acid: 0.1-0.2 parts.

[0019] Put the mixture into a high-speed mixer, stir at a high speed, fully mix, and heat up to about 130°C to obtain clinker; then put the clinker into the cold pot, stir at a low speed, and prepare the mixture after cooling to 40°C; The mixed material is transported to the hopper of the twin-screw extruder, and the twin-screw extruder extrudes the molten clinker into the mold, wherein, during the extrusion molding process, the temperature of each section of the extrusion barrel is heated at 160°C, 165°C ℃, 170℃, 175℃; after the mold is released, it is vacuum-shaped, cooled and shaped, ...

Embodiment 2

[0021] The components in the PVC component are mixed according to the following proportions by weight to prepare the mixture:

[0022] PVC base material (SG-5 type) 50 parts; calcium carbonate: 10-12 parts; calcium zinc stabilizer: 2-3 parts; CPE: 2.5-3.5 parts; ACR: 1-1.5 parts; titanium dioxide: 2.5-3.5 parts parts; UV-531: 0.15-2.0 parts; polyethylene wax: 0.1-0.2 parts; stearic acid: 0.1-0.2 parts.

[0023] The manufacturing process of building formwork is the same as embodiment 1.

Embodiment 3

[0025] The components in the PVC component are mixed according to the following proportions by weight to prepare the mixture:

[0026] PVC base material (SG-5 type) 50 parts; calcium carbonate: 10-12 parts; calcium zinc stabilizer: 2-3 parts; CPE: 2.5-3.5 parts; ACR: 1-1.5 parts; titanium dioxide: 2.5-3.5 parts parts; polyethylene wax: 0.1-0.2 parts; stearic acid: 0.1-0.2 parts.

[0027] The manufacturing process of building formwork is the same as embodiment 1.

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Abstract

The invention provides a modified polyvinyl chloride (PVC) for producing a building template. The modified PVC comprises the following components of, by weight, 50 parts of PVC basic materials, 10-12 parts of calcium carbonate, 2-3 parts of heat stabilizers, 2.5-3.5 parts of shock resistance modifying agents, 1-1.5 parts of plastification modifying agents, 2.5-5.5 parts of light stabilizers, 0.1-0.2 part of external lubricants and 0.1-0.2 part of internal lubricants. Preferably, the calcium carbonate is used as the fillers, chlorinated polyethylene is used as the shock resistance modifying agents, acrylate copolymer is used as the plastification modifying agents, titanium dioxide and UV-531 are used as the light stabilizers, stearic acid is used as the internal lubricants, and polyethylene wax is used as the external lubricants. By means of combined actions of the various components, the shock resistance performance of the modified PVC meets requirements of the building template, and the modified PVC has a smooth surface and can be easily molded.

Description

technical field [0001] The invention relates to a kind of PVC (polyvinyl chloride), in particular to a kind of modified PVC used for making building formwork. Background technique [0002] Building formwork is a temporary model structure in building construction, which is used to ensure that the concrete structure is poured and formed according to the design requirements. During the construction process, the building formwork has to bear the horizontal load of the concrete structure, as well as the vertical load brought by its own weight and construction pressure. In order to ensure the safety of building construction, building formwork needs to have good rigidity and impact resistance. [0003] Among the building formwork made of various materials, plastic formwork has gradually replaced the previous wooden, bamboo and steel formwork due to its advantages of high turnover times and recyclability, and has become the future development trend of building formwork. Plastic fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/28C08L51/00C08K13/02C08K3/26C08K3/22C08K5/09
Inventor 张铁钢刘国恩石亚明王涛
Owner BEIJING AOYU FORMWORK
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