Project Description

Water Soluble Unsaturated Polyester Resin for Filament, Spun/Staple Yarn, Cotton Yarn, and Blend Yarn Sizing

Polyester Resin for Fabric Stiffening, Waterproof Coating, and Digital Printing Paper

Description: Water-soluble polyester resin is a water-based, sulfonated, and unsaturated polymer. And it is anionic.
The primary raw materials are PTA and MEG. After the esterification and polymerisation, a polyester resin is produced.
This product has a wide application. In this article, we mainly discuss the usage of warp yarn sizing.
The sizing operation links yarn making, weaving, and finishing in the textile industry. The process of applying protective adhesive coating on the surface of yarns is known as sizing. Sizing chemicals are mainly used to warp yarns, improving their performance during weaving. And sizing is part of yarn preparation or weaving.

Polyester Sizing Dispersion

Application: warp yarn sizing, coating, gumming, or slashing

1. WSP-010: Polyester Filament Sizing
Only need to add an anti-foaming agent and some antistatic additive.
It can totally replace acrylic binder and other sizing chemicals.
FDY 75D/36F
Dispersion Percentage: 10% (refractometer reading)
Size Pick-up: 3.5%
DTY 75D/72F
Dispersion Percentage: 6.5% (refractometer reading)
Size Pick-up: 4.8%

COOKING PROCEDURE (For example: 19% REFRACTOMETER READING)

  • Prepare D.M. or R.O. water (preferably with TDS less than 80, and colourless& free from impurities).
  • Start the stirring atroom temperature. Stirring RPM should be above 500.
  • Put 3 tons of Water and 1kg of anti-static agent (if necessary) into the cooking tank (6.5-ton capacity).
  • Start heating by opening the steam valve.
  • After the temperature reaches 90°C, continue stirring and add the RESIN bags slowly.
    Empty one resin bag every 8-10 min. You need to put 1 ton of WSP resin in total.
  • After adding the last bag, continue heating and stirring for the next 40-45 min. Efficient heating & stirring will ensure proper & stable preparation.
  • When the water temperature in the tankreaches 96℃, the steam valve can be closed. After stirring and simmering for 1 hour, add 2.2tons of water. (keeping stirring)
    When the temperature drops to 60℃, add additives (12kg of anti-foaming agent and 12kg of smoothing agent).
    Continue stirring for 15-20 min to ensure the additives dissolve completely in the dispersion.
  • Checkwhetherthe refractometer reading is 19%. (As per result, adjust accordingly, if needed.)
  • Filter the dispersion through an appropriately sized 200-mesh net.
  • Before sizing, dilute the dispersion to the required solid concentration and ensure it is well stirred.

2. WSP-020: Polyester Spun Yarn, Cotton, or Blend Yarn Sizing, the primary agent for one-shot sizing chemical
It can reduce particle size to 30-mesh powder. That can help customers protect their recipes.
Polyester Powder
Need to mix with PVA, acrylic, and starch.
Below is the recipe for 36/1 PV (30, 36, 40 all the same)
Soft Water: 700 litres
Modified Starch: 80 kg
Polyester resin: 10 kg
Any Acrylic binder: 5 kg
Wax: 1 kg
(Slasher sizing machine with 250rpm, sectional warp sizing, fabric 80″, and number of ends 6675)

COOKING PROCEDURE (For example: 19% REFRACTOMETER READING)

  • Fill the tank with 400L of room-temperature water.
  • Start stirring, then add all chemicals.
  • Stop stirring to verify/top up the volume to 900L.
  • Restart stirring and heat via steam to 120°C.
  • Hold at 120°C (pressure cooking) for 30 minutes.
  • Discharge to the service tank.
  • Measure viscosity. Target: 6.5 – 7.0.
  • Use a viscosity reducer if the reading is > 7.0.
WSP-020 Sizing Recipe

WSP-020 Sizing Recipe

Types: 
Currently, there are original pet resin and recycled pet resin.
The former is made from PTA and MEG, and the latter is made from recycled bottle flakes.
Generally speaking, the original one performs better, and the recycled one is cheaper.

Features:
water soluble polyester resin

1. High abrasion resistance
2. Excellent adhesive and cohesive properties
3. Good flexibility and single yarn strength
4. Easy desizing
5. Compatible with starch and other binders
6. Can partially or fully replace PVA in the sizing recipe
Based on the current recipe, replace 2 kg of PVA with 1 kg of WSP resin (using modified starch to cover the Deficient part) while maintaining the duplicate solid content.

Packaging 

We can pack material with 25kg plastic or paper bags. And in one 20 GP container, we can load 20 MT – 24 MT. Different packaging is available upon request.

Packaging Pics