Polyurethane Water-Based Varnish

Polyurethane water-based varnish is a waterborne polyurethane dispersion with soft hand feel. It is suitable for the coating of pure Pu labor protection gloves with high solid content. Polyurethane polymer is solvent-free and formaldehyde free. It is soft and elastic. It has excellent wear resistance and appearance. It is milky white liquid, pH 7 0-8.0 solid content 50 ± 1% ionic anion viscosity (25 ℃) 200-300cp tensile strength (MPA) ＞ 25 film quantity ＞ 20 elongation ＞ 650 leather coating textile coating glove coating 1000kg / barrel products should be stored in closed containers to avoid freezing and high temperature. It is recommended that the normal storage temperature be 5 ℃ ~ 35 ℃, and the storage period is 6 months from the date of packaging. Waterborne PU resin can be transported as non dangerous goods.

Properties and physical properties of polyurethane water-based varnish:

Appearance: translucent emulsion

Ingredients: aliphatic

Ionic type: anion

Solid composition: 35 ± 2%

Viscosity (25 ℃): below 500cps

Modulus (100%): 300kg / cm²

PH value: 7 ~ 9

Characteristics of polyurethane water-based varnish:

High gloss Aliphatic Waterborne Polyurethane, alkali resistant, alcohol resistant, and other solvents. Scratch resistance, no yellowing, good UV resistance, good adhesion to hard substrate. 2% - 3% curing agent can be added to improve chemical and mechanical properties.

Application of polyurethane water-based varnish:

It is used for surface polishing and coating of high-grade wood paint, industrial paint and special paper with high hardness and solvent resistance.

Storage and shelf life of polyurethane water-based varnish:

1. The storage period is 12 months and the storage temperature is 0 ~ 40 ℃. The storage environment shall not be lower than 0 ℃, otherwise it will freeze; If the temperature is higher than 40 ℃, it will agglomerate and cannot be recovered.

2. This product should be placed in a ventilated and dark place. Avoid high temperature or direct sunlight. Sealed storage is required to avoid water volatilization and conjunctiva.

Polyurethane water-based varnish product features:

1. High stability: the product has high stability, convenient use, worry saving and high efficiency.

2. Quality assurance: the manufacturer has mature technology, strictly selects raw materials and ensures the quality of excellent raw materials.

3. No pollution: This product has no harmful solvent volatilization, no impact on human body and environment.

4. Wide application: This product is widely used and can be used in various related occasions.

Polyurethane aqueous varnish grinding process:

1. Grinding, grinding is mainly to reduce the fineness of resin and pigment. The fineness of grinding can range from 8-20um according to the needs of printing. Generally speaking, the smaller the fineness, the better the effect of water-based ink printing. Of course, it is also related to the printing machine and technology. The fineness of zhongzhixing color grinding is about 8um.

2. Dispersion: the polyurethane material and pigment are stirred and dispersed by a high-speed disperser.

3. Pulping: according to the formula, the dispersed materials plus additives are prepared into water-based ink paste. Zhongzhixing matte water-based varnish environmental friendly water-based ink has fast drying speed and strong weather resistance.

4. The preparation of ink, the production of good color paste plus water dilution is the finished water-based ink. Some printing enterprises can directly buy color paste if they need to dilute by themselves.

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