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

A kind of slow release rawhide bulking agent and its preparation method and application

A swelling agent and rawhide technology, which is applied in the field of preparation of slow-release rawhide swelling agent, can solve the problems of difficulty in controlling the looseness of collagen fiber separation and severe swelling, and achieve easy filtration, recovery and recycling, controllable degree of hydrolysis, and reduced pollution Effect

Active Publication Date: 2017-03-01
白银普瑞特化工有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the hydrolyzate of sodium silicate is also sodium hydroxide, its swelling effect is also very severe, the fiber expansion is obviously fast, and the looseness of collagen fiber separation is difficult to control

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
  • A kind of slow release rawhide bulking agent and its preparation method and application
  • A kind of slow release rawhide bulking agent and its preparation method and application
  • A kind of slow release rawhide bulking agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A sustained-release raw hide swelling agent is a granular substance, with two layers from the inside to the outside, the inner layer is sodium silicate particles, and the sodium silicate particles are coated with polyvinyl alcohol coating.

[0045] The preparation method of the sustained-release rawhide swelling agent mainly includes the following steps:

[0046] (1) Preparation of coating agent

[0047] After swelling 3 parts by weight of commercially available polyvinyl alcohol PVA-2488 in 50 parts by weight of water at 30 degrees Celsius for 2 hours, add 47 parts by weight of water, stir, heat up to 90 degrees Celsius, stir until polyvinyl alcohol is fully dissolved, and add a small amount of 2 Adjust the pH to 4.0 with% dilute hydrochloric acid, add 1 part by weight of formaldehyde solution (30%), keep it at this temperature for 2 hours, adjust the pH of the system with 5% sodium hydroxide aqueous solution to 8.5 and then cool down for use;

[0048] (2) Coating agent

[0049...

Embodiment 2

[0057] A sustained-release rawhide swelling agent is granular, with two layers from the inside to the outside, the inner layer is sodium silicate particles, and the sodium silicate particles are coated with polycaprolactam coating.

[0058] The preparation method of the sustained-release rawhide swelling agent mainly includes the following steps:

[0059] (1) Preparation of coating agent

[0060] After swelling 10 parts by weight of commercially available polycaprolactam in 50 parts by weight of water at 30 degrees Celsius for 2 hours, add 40 parts by weight of water, stir, heat to 90 degrees Celsius, stir until the polycaprolactam is fully dissolved, add a small amount of 5% dilute sulfuric acid to adjust the pH Add 2 parts by weight of formaldehyde solution (30%) to 5.0, keep it for 2 hours at this temperature, adjust the pH of the system to 9.0 with a 2% calcium hydroxide aqueous solution, and then lower the temperature for use.

[0061] (2) Envelope

[0062] a. Commercially availab...

Embodiment 3

[0070] A slow-release rawhide swelling agent, in the form of granules, with two layers from the inside to the outside, the inner layer is a mixture of sodium silicate and calcium hydroxide particles, and the sodium silicate particles are coated with modified Polyvinyl alcohol coating.

[0071] The preparation method of the sustained-release rawhide swelling agent mainly includes the following steps:

[0072] (1) Preparation of coating agent

[0073] After swelling 5 parts by weight of commercially available polyvinyl alcohol PVA-1799 in 50 parts by weight of water at 30 degrees Celsius for 2 hours, add 47-40 parts by weight of water, stir, heat up to 90 degrees Celsius, stir until the polyvinyl alcohol is fully dissolved, add Adjust the pH to 4.5 with a small amount of 3% dilute hydrochloric acid, add 1 part by weight of formaldehyde solution (30%), keep it at this temperature for 2 hours, adjust the pH of the system to 9.0 with calcium hydroxide aqueous solution, and then lower 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 discloses a sustained-release raw hide swelling agent. The swelling agent at least comprises two layers from inside to outside, wherein the innermost layer is a raw hide swelling agent particle body coated with at least one layer of polymer coating film. The invention further provides a preparation method of the swelling agent. The preparation method comprises steps as follows: (1) preparation of a coating agent; (2) coating; (3) mixing of products with different release curves. The invention further relates to an application of the sustained-release raw hide swelling agent to a leather alkaline swelling technology. The sustained-release raw hide swelling agent has the advantages as follows: (1) the sustained-release raw hide swelling agent is proper in dissolution speed, controllable in hydrolysis degree, slow and uniform in fiber swelling and suitable for a liming process of various leather, including upper leather; (2) the lime consumption in the liming process is very low, so that sludge during liming is effectively reduced, and the requirement for clean production of leather is met; (3) a hair saving and removing agent is combined for use, so that sodium sulfide or sodium hydrosulfide can be omitted during liming, the sulfide pollution is reduced, and liming waste liquids are easy to filter, recover and recycle.

Description

Technical field [0001] The invention belongs to the field of leather processing, and specifically relates to a slow-release rawhide expanding agent of Preparation method and application. Background technique [0002] The degree of separation and looseness of skin collagen fibers directly affects the softness, fullness, elasticity, grain state, physical and mechanical properties and area yield of the finished leather. The separation process of skin collagen fibers is the key to affecting the loosening effect of skin collagen fibers, which mainly occurs in the liming and hair removal process of the preparation section. Traditional soda sulfide and lime liming hair removal have been widely used by tannery because of their low cost, simple operation process, high hair removal efficiency, and mild swelling effect. However, the low solubility of lime and excessive use lead to the production of a large amount of lime sludge containing organic matter and sulfide in the process of ash-al...

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 Patents(China)
IPC IPC(8): C14C1/06
CPCC14C1/06
Inventor 吴育彪关正祥党建荣邱庭彦高华林马会军张红力高传福李青松
Owner 白银普瑞特化工有限公司
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