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Large-particle rotational molding composite material with different flower color surface effects and preparation method of large-particle rotational molding composite material

A composite material and surface effect technology, applied in the field of rotomolding, can solve the problem that it is difficult to form large patterns with a diameter greater than 1mm, and achieve the effect of beautiful visual effect, good product performance and simple preparation method

Active Publication Date: 2021-08-27
ZHEJIANG ROTOUN PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that it is difficult to form large patterns with a diameter greater than 1mm in rotational molding, the present invention provides a large particle rotational molding composite material with different surface effects of patterns and its preparation method, which can produce no shortage of materials, clear and uniform patterns, inner surface Large pattern rotational molding products with good leveling properties

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A large particle rotomoulding composite material with different surface effects, composed of A material powder, B material granule and C material granule, wherein the mucous membrane temperature from high to low is C material granule > B material granule > A material powder, The preparation method is:

[0024] (1) Preparation of material A powder: mix polyethylene (7042, Zhenhai Refining & Chemical) with a high-speed mixer for 4 minutes, set the temperature of each section of the extruder to 200°C, and the screw speed to 300rpm, and melt blend in a twin-screw extruder Granulate and dry to obtain material A granules; grind the material A granules with a plastic mill, and the milling process parameters: the temperature of the grinding disc is ≤ 70° C., and the rotational speed of the grinding disc is 3000 rpm to obtain the material A powder. The powder of material A is a natural powder with a particle size of D95=425μm, a powder fluidity of 25s / 100g, and a light transmitt...

Embodiment 2

[0035] A large particle rotomoulding composite material with different surface effects, composed of A material powder, B material granule and C material granule, wherein the mucous membrane temperature from high to low is C material granule > B material granule > A material powder, The preparation method is:

[0036] (1) Preparation of material A powder: Polyethylene (7149U, Qilu Petrochemical) was mixed for 3 minutes in a high-speed mixer, the temperature of each section of the extruder was set at 130 ° C, the screw speed was 100 rpm, and the twin-screw extruder was melt-blended to produce granules, dried to obtain material A granules; grind material A granules with a plastic mill, milling process parameters: milling disc temperature ≤ 70°C, milling disc rotating speed 2500rpm, to obtain material A powder. The powder of material A is a natural powder with a particle size of D95=485μm, a powder fluidity of 33s / 100g, and a light transmittance ≥ 60%.

[0037] (2) Preparation of...

Embodiment 3

[0044] A large-particle rotomolding composite material with different surface effects, in which the mucous film temperature from high to low is C material particles > B material particles > A material powder, composed of A material powder, B material granules and C material granules, The preparation method is:

[0045] (1) Preparation of material A powder: Mix polyolefin elastomer (C5070D, Sabic, Saudi Arabia) with a high-speed mixer for 3-5 minutes, set the temperature of each section of the extruder to 280°C, and the screw speed to 500rpm, twin-screw extruder Melting, blending, granulation, and drying to obtain material A granules; grind the material A granules with a plastic mill, and the milling process parameters: the temperature of the grinding disc is ≤ 70°C, and the rotational speed of the grinding disc is 3200rpm to obtain the material A powder. The powder of material A is a natural powder with a particle size of D95=465μm, a powder fluidity of 33s / 100g, and a light t...

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Abstract

The invention relates to the field of rotational molding, and provides a large-particle rotational molding composite material with different pattern surface effects aiming at the problem that large patterns with the diameter of more than 1mm are difficult to form by rotational molding, the large-particle rotational molding composite material is prepared from the following components in apparent volume fraction: 5-35 parts of A material powder, 30-90 parts of B material particles and 5-35 parts of C material particles, the base materials of the A material powder, the B material particles and the C material particles are resin, the mucosa temperature is that the material particles C are greater than the material particles B and greater than the material powder A in sequence from high to low, and the material particles B are granular materials with the diameter of 1-3mm and the length of 2-4mm and are a mixture of particles with a plurality of colors. The method can be used for manufacturing the large-pattern rotational molding product which is free of material shortage, clear and uniform in pattern and good in inner surface leveling property. The invention further provides a preparation method of the large-particle rotational molding composite material with the different color surface effects.

Description

technical field [0001] The invention relates to the field of rotomolding, in particular to a large particle rotomoulding composite material with different surface effects and a preparation method thereof. Background technique [0002] Rotational molding is a plastic processing method that uses a rotating mold for processing. The processing process is to put plastic powder or slurry into the mold, and the closed mold is rotated or shaken on the equipment, and the mold is heated by an open flame or hot air. External heating, the plastic powder or slurry is turned and flowed inside the mold in a heated state. After the temperature reaches the softening point, it is gradually coated on the inner surface of the mold, melted and condensed. The mold is placed in a natural environment or passed through water or fog. , wind and other media to cool down and remove the mold to take out the product. [0003] It is a common practice in the industry to produce rotomolded products with sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K5/521C08K5/103
CPCC08L23/06C08K5/103C08K5/521C08L23/0815
Inventor 陈叶茹温原施海锋
Owner ZHEJIANG ROTOUN PLASTIC TECH
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