Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for producing a lignocellulose plastic composite material

A technology for lignocellulose and composite materials, applied in the field of lignocellulose plastic composite materials, can solve problems such as adverse effects on the appearance and technical characteristics of the composite, and achieve the effect of avoiding drying and high production capacity

Inactive Publication Date: 2018-06-08
UNIV OF HAMBURG
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Agglomerates thus formed in the compound and in the final product adversely affect the appearance and technical properties of the compound

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing a lignocellulose plastic composite material
  • Method for producing a lignocellulose plastic composite material
  • Method for producing a lignocellulose plastic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The experiments described below employed low density polyethylene (LDPE) and fir sawdust for the wet composite treatment according to the invention. Wherein adopted mixing ratio is 60% Chinese fir sawdust and 40% LDPE (mass ratio). Before fiberizing in the refining unit, the sawdust has been precooked for 6 minutes in a paddle reactor at a temperature of 170°C. 5kg of debris and 10L of water were placed in it. Through this type of hydrothermal pretreatment, the middle plies of the wood fibers are softened, thereby reducing the elastic modules and at the same time facilitating fiberization in the refining unit. In industrial processes, such as MDF production, the chips are precooked and subsequently fiberized in a continuous process. Among them, a closed pressure system is used from the cooker to the refining unit, with a temperature range of 170°C to 200°C and a pressure range of 6 to 12bar. However, the experimental refining unit used here involves an open system in...

Embodiment 2

[0051] Polypropylene (PP) and high density polyethylene and fir / pine wood chips were compositely treated according to the present invention for the test implementation described below. The chip had an initial material moisture content of 13%. Individual test parameters and material composition and specification information are listed in Table 2. The following type of pressure refiner 2 was used for this test: Sprout-Waldron 12" boiler with pre-opening (capacity 55l) (see figure 2 ). With the pressure refiner 1 used in the implementation of the experiments described, an industrial application can be demonstrated over a longer period of time than in Example 1.

[0052]The material has previously been mixed by hand with the addition of water and then placed in the boiler 12 . The material had been heated at 125°C and 145°C for 10 minutes before the fibrillation treatment. The distance between the hammer and disk of the refiner is set to 0.1mm. After heating is complete, the...

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

No PUM Login to View More

Abstract

The invention relates to a method for producing a lignocellulose plastic composite material. The problem addressed by the invention is that of providing an improved, with respect to the prior art, inparticular simpler and more cost-effective option for producing lignocellulose plastic composite materials. In order to solve the problem, the invention provides a method for producing a lignocellulose plastic composite material, wherein a. thermoplastic particles and a mixture of water and lignocellulose-containing particles and thermoplastic particles are supplied to a refiner, and b. the lignocellulose-containing particles are reduced to fibres in the refiner, and wherein the thermoplastic particles are supplied to the refiner in a melted or fused state, or are melted or fused in the refiner, so that the melted or fused thermoplastic particles and the lignocellulose-containing particles that are reduced to fibres form material composite particles in the refiner.

Description

technical field [0001] The invention relates to a method for producing lignocellulosic plastic composites and lignocellulosic plastic composites produced or producible thereon. Background technique [0002] Raw materials containing lignocellulose, such as logs or bamboo, or various natural fibers are increasingly used as reinforcements or fillers in composite materials. The reason for this is the increasing scarcity of raw materials and the need for sustainable development. In addition, specific material properties such as increased hardness and resistance to thermoplastics can be achieved. The areas of application for "wood-plastic composites" (WPC) or natural fiber-reinforced composites (NFK) are primarily the construction industry (e.g. balcony construction) or the automotive industry (e.g. door inner panels). In 2012, the market share of WPC and NFC composites produced in Europe reached 15% (352,000 tons). Its output is expected to increase significantly. In specific...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/04B29B9/14C08J3/12B01F23/57B01F23/70
CPCC08J3/12C08J2323/06C08J2323/12B29B7/92B29B13/10C08J5/045B29B7/94B29B7/905B29B7/826B29B9/16B29B7/40B01F23/53B01F23/57B01F23/711B01F33/83B01F33/83613B01F2101/2805
Inventor 安德烈亚斯·克劳泽奥利弗·默滕斯奥塔·克德沙其娅
Owner UNIV OF HAMBURG