A low-shrinkage polyolefin composition and its preparation method and application
A low shrinkage, polyolefin technology, applied in the field of polyolefin materials, can solve the problems of fast crystallization of polypropylene, loss of mechanical properties, imperfect appearance, etc., to achieve low shrinkage, reduced shrinkage, and good product appearance.
Active Publication Date: 2022-07-12
CHINA PETROLEUM & CHEM CORP +1
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the symmetrical regularity of its structure, the crystallization speed of polypropylene is fast and the shrinkage rate is large. In practical applications, it will cause imperfect appearance such as deformation of the product and loss of mechanical properties.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0017] In order to be more suitable for the preparation of 3D printing filaments, preferably, based on 100 parts by weight of polypropylene, the content of polyethylene is 10-30 parts by weight, and the content of polybutene is 5 parts by weight ~10 parts by weight, the content of the petroleum resin is 2-6 parts by weight, the content of the inorganic powder is 10-20 parts by weight, and the content of the processing aid is 0.1-1 part by weight.
[0018] Preferably, the polypropylene is an impact copolymer polypropylene, and its melt index at 230° C. under a load of 2.16 kg is 10-30 g / 10 min.
[0019] Preferably, the polyethylene is a linear low density polyethylene with a number average molecular weight of 50,000-300,000.
[0020] Preferably, the polybutene is 1-polybutene and / or 2-polybutene.
[0021] In the present invention, adding petroleum resin to polypropylene can significantly reduce the crystallinity of polypropylene. Petroleum resin is a thermoplastic resin produ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| melt flow index | aaaaa | aaaaa |
| shrinkage | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the field of polyolefin materials, and discloses a low-shrinkage polyolefin composition and a preparation method and application thereof. The low-shrinkage polyolefin composition contains polypropylene, polyethylene, polybutene, petroleum resin and inorganic powder. Body and processing aid, wherein, based on the content of polypropylene as 100 parts by weight, the content of polyethylene is 10-30 parts by weight, the content of polybutene is 1-10 parts by weight, and the content of petroleum resin is 1-10 parts by weight parts by weight, the content of the inorganic powder is 10-30 parts by weight, and the content of the processing aid is 0.1-5 parts by weight. The polypropylene material prepared from the polyolefin composition of the present invention is suitable for preparing 3D printing filaments, and the filaments have a uniform diameter, smooth surface, low shrinkage rate of printed products, and good product appearance.
Description
technical field [0001] The invention belongs to the field of polyolefin materials, and more particularly, relates to a low-shrinkage polyolefin composition and a preparation method thereof, and the application of the low-shrinkage polyolefin composition in 3D printing. Background technique [0002] As a common polymer material, polypropylene has a wide range of applications in industry and life. Due to the symmetry and regularity of its structure, polypropylene has a fast crystallization rate and a large shrinkage rate. In practical applications, it will cause imperfect appearance such as product deformation and loss of mechanical properties. In order to reduce the shrinkage rate of polypropylene, copolymer components are generally added to destroy the crystallization ability of polypropylene, so as to achieve the purpose of reducing the shrinkage rate. [0003] Patent CN1256379C invented a new type of ultra-low shrinkage polypropylene material, including polypropylene, pol...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/20C08L9/08C08L57/02C08K3/26C08K5/20C08K5/526C08K13/02B33Y70/10
CPCC08L23/12B33Y70/00C08K2201/011C08K2003/265C08L2205/035C08L23/06C08L23/20C08L9/08C08L57/02C08K3/26C08K5/20C08K5/526C08K13/02
Inventor 董穆杨庆泉徐萌侴白舸张师军高达利徐毅辉吕芸陈若石邵静波初立秋
Owner CHINA PETROLEUM & CHEM CORP