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Polypropylene coating material and preparation method thereof

A technology of polypropylene coating and polypropylene, which is applied in the direction of coating, etc., can solve the problems of increased shrinkage rate of extruded film, difficulty in heat sealing during processing, and impact on product quality, so as to achieve wider film width and reduce shrinkage phenomenon , Improve the effect of product quality

Inactive Publication Date: 2013-08-28
南京金浦锦湖化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shrinkage of PP (polypropylene) and PE (polyethylene) after heating, the shrinkage phenomenon is serious when extruded into a film, which affects the product quality. The higher the temperature, the faster the extrusion speed and the more serious the shrinkage.
In addition, when a variety of raw materials are mixed, there is a problem of uneven plasticization during film formation. If the temperature is too high, the plastic will easily decompose, the product will be brittle and hard, and the shrinkage rate of the extruded film will increase, which will easily cause difficulties in post-processing heat sealing.

Method used

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  • Polypropylene coating material and preparation method thereof
  • Polypropylene coating material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Embodiment 1: present embodiment polypropylene coating material, its component comprises: polypropylene powder 82 parts, surfactant (silicone oil) 0.8 part, acetone 1.0 part, lubricant (polyethylene wax CH-4 type) 0.8 part 10.8 parts of LDPE (1C7A), 4.5 parts of LLDPE (7042), 0.1 parts of polypropylene chemical degradation agent (2,5-dimethyl-2,5-di-tert-butylperoxyhexane), in parts by weight . All the above components are commercially available products.

[0015] In this embodiment, besides the lubricating effect, polyethylene wax also has the function of dispersion and material reinforcement. In addition to the CH-4 type used in this embodiment, CH-2, CH-3, CH-6, CH -9 type products.

[0016] In the present embodiment, the trade mark of the LDPE used is 1C7A (melt flow rate is 7g / 10min), has typicality, can also use 1C10A (melt flow rate is 10g / 10min);

[0017] In the present embodiment, the trade mark of the LLDPE used is 7042, is the common trade mark of LLDPE; ...

Embodiment 2

[0021] Embodiment 2: present embodiment polypropylene coating material, its component comprises: polypropylene powder 80.0 parts, surfactant (silicone oil powder) 1.2 parts, acetone 1.2 parts, lubricant (polyethylene wax CH-2 type) 0.5 parts, 11.3 parts of LDPE (1C7A), 4.8 parts of LLDPE (7042), 1 part of polypropylene chemical degradation agent (2,5-dimethyl-2,5-di-tert-butylperoxyhexane), in parts by weight count. All the above components are commercially available products.

[0022] The preparation method of polypropylene coating material is:

[0023] (1) After mixing the polypropylene powder, surfactant, acetone, lubricant and polypropylene chemical degradation agent of the weight portion at a high speed, utilize a single (twin) screw extruder to extrude, granulate and plasticize;

[0024] (2) Mix the mixture granules obtained in step (1) with the LDPE and LLDPE in said parts by weight to obtain a polypropylene coating material.

Embodiment 3

[0025] Embodiment 3: present embodiment polypropylene coating material, its component comprises: polypropylene powder 78 parts, surfactant (polyether modified silicone oil) 0.9 part, acetone 0.5 part, lubricant (polyethylene wax CH- Type 3) 0.6 parts, LDPE (1C7A) 20 parts, by weight. All the above components are commercially available products.

[0026] The preparation method of polypropylene coating material is:

[0027] (1) After mixing the polypropylene powder, surfactant, acetone and lubricant at a high speed of the weight portion, utilize a single (twin) screw extruder to extrude, granulate and plasticize;

[0028] (2) Mixing the mixture particles obtained in step (1) with the LDPE in parts by weight to obtain a polypropylene coating material.

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Abstract

The invention discloses a polypropylene coating material and a preparation method thereof. The polypropylene coating material comprises the following components in parts by weight: 78.0-83.0 parts of polypropylene material, 0.6-1.2 parts of surfactant, 0.5-1.2 parts of acetone, 0.5-1.0 part of lubricating agent, 10.8-20.0 parts of LDPE (Low-Density Polyethylene), 0-4.9 parts of LLDPE (Linear Low Density Polyethylene) and 0-1.0 part of polypropylene chemical degradation agent. The invention further discloses a method for preparing the polypropylene coating material. According to the invention,an appropriate amount of substances such as the surfactant and the like are added into the polypropylene coating material, so that the surface stress of a coating film is lowered, the activity is increased, the width of a formed film during coating is increased, and the phenomenon of shrinkage is lightened; and the surfactant has high dispersity, so that the formed film is uniform, and the product quality is improved.

Description

technical field [0001] The invention relates to a polypropylene coating material and a preparation method thereof. Background technique [0002] The coating material of polypropylene is mainly suitable for surface coating of plastic woven bags, paper-plastic composite, film composite, etc. It has the characteristics of high strength, strong adhesion, good fluidity, uniform film formation, waterproof and moisture-proof. [0003] The existing technology generally uses general-purpose polypropylene and LDPE (low-density polyethylene) mixed coating, or CRPP (rheological behavior controlled polypropylene) after polypropylene degradation and a small amount of LDPE (+LLDPE) [low-density polyethylene ( Linear low density polyethylene)] mixed coating. Due to the shrinkage of PP (polypropylene) and PE (polyethylene) after being heated, the shrinkage phenomenon is serious when extruded into a film, which affects the product quality. The higher the temperature, the faster the extrusion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D123/12C09D123/06C09D123/08C09D7/12
Inventor 周双齐
Owner 南京金浦锦湖化工有限公司
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