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Polyester type ultra-low density polyurethane resin for shoes

An ultra-low density polyurethane shoe technology, applied in footwear, applications, clothing, etc., can solve the problems of unfavorable production efficiency and economic benefits, shrinkage and deformation of insole products, slow molding, etc., achieve good appearance and surface effects, and improve product grades , Ease of use

Active Publication Date: 2009-12-23
无锡双象新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rebound of the improved insole product has improved, but the molding is still relatively slow, and it still takes 6 to 8 minutes to be demolded, and the insole product still has shrinkage and deformation, and the density is relatively high, which affects production efficiency and economy. Extremely unfavorable

Method used

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  • Polyester type ultra-low density polyurethane resin for shoes
  • Polyester type ultra-low density polyurethane resin for shoes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The molding and processing conditions of polyester ultra-low density polyurethane resin for shoes are as follows: component A and component B are preheated in an oven at 60±5°C for 4 to 6 hours, then take out component C and add it to component A. Make up the A component mixture. The amount of C is generally 1.22 to 1.5% of A.

[0037] (1) Manual operation: Weigh 100 parts of component A and 62 parts of component B, and pour them into the mold cavity for foaming under 2500r / min strong stirring for 5-9 seconds.

[0038] (2) Mechanical operation: pour the mixed components into material tank A of the shoe-making machine, circulate in the shoe-making machine through a metering pump, and measure during the pouring operation. Component B is poured into the material tank B of the shoe-making machine, circulated in the shoe-making machine through a metering pump, and is metered during the pouring operation.

[0039] (3) The mixing equivalent of the mixed components is about 1...

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Abstract

The invention is a shoe resin formulation for insoles, which belongs to polyester type three-component polyurethane resin. Component A is OH-based raw material, which is a mixture containing active hydrogen, mainly composed of long-chain polymer polyols, chain extenders, crosslinking agents, surfactants, foaming agents and other additives. Component B is NCO raw material, mainly MDI prepolymer modified with polyester or polyether. Component C is a catalyst, which is composed of triethylenediamine in ethylene glycol solution. The present invention adopts four kinds of polyester polyols in component A, changes the skeletons of the past two polyols, and adds two polyols of polyester polyols b and d, which is a major breakthrough in the skeleton and changes The structure of the material is changed, which also makes a fundamental change in the appearance and physical properties of the material. In addition, two kinds of foaming agents and two kinds of silicone oils are used, which greatly increase the foaming power and fluidity of the material, make the density of the product lower and more stable, and save the amount of material used. The density is also much lower than similar polyester products, the general density is 0.25~0.30g / cm3. Not only that, the present invention also improves the B component, which greatly reduces the shrinkage phenomenon of the product, the cortex is thicker, the appearance surface effect is better, and the product grade is improved. The product produced by the invention has fast setting, fast curing and short mold release time, which can be released from the mold in 2.5 to 3.5 minutes from the original 7 to 9 minutes, which greatly improves the production efficiency.

Description

technical field [0001] The invention relates to a three-component resin for shoes, in particular to a polyester type ultra-low density polyurethane resin for shoes, which is mainly used in the production of insoles. Component A is a hydroxyl (OH) raw material, which is a mixture containing active hydrogen, and is mainly composed of long-chain polymerized polyols, chain extenders, crosslinking agents, surfactants, foaming agents and other additives. Component B is isocyanate (NCO) raw material, mainly 4.4 diphenylmethane diisocyanate (MDI) prepolymer modified with polyester or polyether. Component C is a catalyst, which is composed of triethylenediamine in ethylene glycol solution. When using, generally a certain amount of component C is added to component A, mixed evenly, used as a component, and then reacted with component B. Among them, the main purpose of storing components A and C separately is to extend the shelf life so that the resin is not easy to deteriorate. tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G18/48C08J9/00A43B1/14
Inventor 何天华毛本春许磊吴宇
Owner 无锡双象新材料有限公司
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