Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparing process of composite sound absorbing paper

A preparation process and industrial technology, applied in the direction of paper, papermaking, paper machine, etc., can solve the problems of difficult processing, difficult degradation, harmful to human body, etc.

Inactive Publication Date: 2008-10-15
SHAANXI UNIV OF SCI & TECH
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of material has its own advantages as a sound-absorbing material, but many materials also have disadvantages such as harmful to the human body, difficult to degrade, and difficult to process and shape.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: at first, the leather waste material that produces in the leather industry is processed through water washing, degreasing, deodorization, cuts into the fritter of 4mm * 4mm and mixes with water by the mass ratio of 8: 100, utilizes the method for making paper then in Beat in a PFI refiner for 4000 rpm, wash and sieve to obtain collagen fiber pulp; then tear the bleached coniferous wood pulp board into 25mm×25mm pieces, soak in water for 4 hours, and then beat in a beater to 30° SR; then the mass percentage is 20% collagen fiber pulp, 70% bleached coniferous wood pulp, 10% vermiculite powder passing 100 mesh sieve and mixes, and adds 0.02% flow aid and filter aid cationic polymer to the mixed slurry mass percentage Acrylamide (CPAM) was used to prepare the mixed pulp; finally, the mixed pulp was decomposed for 1000 revolutions in a standard pulp decomposer, and the concentration was adjusted to be 0.35g / L. Press down for 30s and vacuum dry at 92°C for 2-4 m...

Embodiment 2

[0012] Embodiment 2: at first, the leather waste material that produces in the leather industry is processed through water washing, degreasing, deodorization, is cut into the fritter of 4mm * 4mm and mixes with water by the mass ratio of 12: 100, utilizes the method for making paper then Beat in a PFI refiner for 5000 rpm, wash and sieve to obtain collagen fiber pulp; then tear the bleached coniferous wood pulp board into 25mm×25mm pieces, soak in water for 3 hours, and then beat in a beater to 32° SR; then the mass percentage is 50% collagen fiber pulp, 40% bleached coniferous wood pulp, 10% vermiculite powder passing 100 mesh sieve, and mixed with 0.02% mass percentage of the mixed slurry as a flow aid and filter aid cationic polymer Acrylamide (CPAM) is used to prepare mixed pulp; finally, the mixed pulp is decomposed in a standard pulp sample decomposer for 1000 rpm, and the concentration is adjusted to be 0.5g / L, and the sheet is made in a sheet former, and the wet paper s...

Embodiment 3

[0013] Embodiment 3: at first, the leather waste material that produces in the leather industry is processed through water washing, degreasing, deodorization, cut into 4mm * 4mm fritters and mix with water by the mass ratio of 10: 100, utilize the method for making paper then Beat in a PFI refiner for 3000 rpm, wash and sieve to obtain collagen fiber pulp; then tear the bleached coniferous wood pulp board into pieces of 25mm×25mm, soak in water for 2 hours, and then beat in a beater to 36° SR; then the mass percentage is 30% collagen fiber pulp, 50% bleached softwood pulp, and 20% vermiculite powder passing 100 mesh sieves are mixed, and 0.02% mass percentage of mixed slurry is added to the flow aid and filter aid cationic polymer Acrylamide (CPAM) was used to prepare the mixed pulp; finally, the mixed pulp was decomposed in a standard pulp sample decomposer for 1000 revolutions, and the concentration was adjusted to 0.75g / L, and the sheet was made in a sheet former, and the we...

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 provides a technique for making composite sound-absorbing paper. The method comprises the following steps that: the leather waste materials generated in the leather industry are pre-processed to be washed by water, to remove oil and the fishy smell firstly; secondly, according to certain concentration, the pulping process is performed by the paper-making method in a PEI pulping machine to obtain scattered collagenous fibers; next, the collagenous fibers and bleached softwood pulp are mixed according to certain ratio, a retention and filtration aid and fillings are added, the paper is made in a paper sheet forming machine. The sound-absorbing paper has good function of absorbing sound and reducing noise; the average sound absorption is more than 0.5; moreover, the sound-absorbing material also has good flame retardant property and waterproof property. The technique ensures that the valuable resource of the leather excess material can be utilized reasonably and effectively, provides research train of thought and method for the deep exploitation and utilization of the leather excess material, the application of collagenous fibers and plant fibers to the composite material field, and the cross-over study of the paper-making industry, the leather industry and the acoustic material fields, and has important theoretical significance and particle application value.

Description

technical field [0001] The invention belongs to the intersecting fields of papermaking, leather and acoustic materials, and specifically relates to a process for preparing composite sound-absorbing paper by utilizing collagen fibers and plant fibers. Background technique [0002] my country produces more than 1.4 million tons of leather solid waste and more than 500,000 tons of chromium-containing solid waste every year. The main component of these solids is collagen fibers. If these solid wastes cannot be properly disposed of, it will seriously pollute the environment on the one hand, and cause a lot of waste of collagen fibers and proteins on the other hand. Collagen fibers have micro-elasticity and high tensile strength, and also have many unique properties such as high wear resistance, heat insulation, sound absorption and flexibility, etc., which can be added to paper as a functional material to develop Paper with special functions. [0003] With the development of mo...

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
IPC IPC(8): D21H13/34D21H13/44D21F13/10
Inventor 张美云刘正伟孙丽红郭惠萍钟林新
Owner SHAANXI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com