Low Melt PET Chip Bi-Component Sheath-core Fiber Composite Yarn Spinning

Extrusion Grade COPET for Hot-Melt Adhesive Glue Coating Thermo Plastic Sheet

Description:
Generally, the term “low-melting-point polyester chip” refers to a specialty polymer with a melting point between 90℃ and 220℃.
The melting point of a polyester is the temperature at which a solid crystalline substance changes from a solid to a liquid state. So it reflects the purity of polyester. Generally speaking, pure polyester is a partially crystalline polymer with a melting point of 265℃. However, during production, some impurities are introduced into the polyester through various side reactions. At the same time, defects in polymer crystals and differences in crystallinity will also affect the melting point. The standard melt temperature for low-melt polymers is 110℃. But we can also offer melting points at 90℃, 120℃, 140℃, 160℃, 180℃, 220℃, and 230℃. Among them, LMP chips at 180℃, 220℃, and 230℃ can be precrystallized.

Application:
Low-melting-point polyester chips can produce low-melting-point fiber, low-melting-point synthetic fiber, and thermal-melting mucilage. Its primary usage is acting as a bonding fiber in nonwoven fabrics. The end uses are clothing, bedding, shoe uppers, sleeping bags, sofas, and hygiene products.

LM PET Chip is also a key raw material for masterbatch carriers. That is, low-melt PET chips, conventional chips, and dyes are mixed in a specific proportion to produce the polyester color masterbatch. This product is made by introducing polyester macromolecules into the modified copolymer unit. Its melting point is in the range of 100℃ to 120℃. Commonly used modifiers are phthalic acid, adipic acid, and trimethylolpropane. In this application, low-melt Polymer can provide excellent fluidity, superior dispersibility, and enhanced compatibility.

Recently, LM Polymer has also been extruded into the back coating of nonwoven, automotive interiors,  foam, injection molding, PET sheets, and hot-melt adhesive/glue.

Low Melt PET Chip Application

Low-melt yarn is also known as hot-melt or fusible yarn. There is a sheath-core low-melt bicomponent yarn and a full low-melt polyester yarn.

PARAMETERS:

No. Property Unit                                            Test Results
90℃ 110℃ 120℃ 160℃ 180℃ 200℃
1 Intrinsic Viscosity dl/g 0.566 0.637 0.689 0.641 0.65 0.68
2 Color Value L 48.58 57.50 54 53.50 75.19 56.12
b 5.0 2.70 8.6 3.60 2.80 3.5
3 COOH Content mol/t 30 30 18 22.1 22 27.7
4 DEG Content % 3.16 8.42 8.8 6.32 2.0 1.37
5 Moisture Content % 0.01 0.01 0.15 0.01 0.01 0.15

Lower DEG Content LMP Chips
(Lower DEG Content is caused by more IPA content during the production process.)

                 ITEMS Unit Test Results
120℃ 140℃ 160℃ 180℃ 220℃ 230℃
Intrinsic Viscosity
(60:40, Phenol:TCE @25℃)		 dl/g 0.630 0.67 0.67 0.64 0.66 0.69
DEG Content % 2.63 1.80 2.64 1.2 1.57 1.41
Color Value L 65 62.16 66.82 62 82.9 60.6
b 7.0 3.6 3.5 6.3 5.7 5.8
Moisture Content % 0.10 0.01 0.03 0.02 0.02 0.02
Powder Content mg/kg 16 10.5 10.5 11 11 11
Irregular Size Chip % 0.05 0.05 0.1 0.09 0.1 0.1
Carboxyl End Groups mol/t 18 20 26 19 21.20 28

Pre-crystallized 180-degree Low Melt PET Chip

LMP-180 State Comparison

Blow is the DSC Capture of LMP-180 after crystallization.

DSC Capture LMP-180 (Pre-crystallized)

Packaging: We offer international-standard packaging for improved storage, safety, and handling. 

*double-layer bags (25kg/bag): inner PE liner and outer PP woven bag
*Jumbo Bags – 1000 kg/bag
All the above-listed packaging has a moisture-proof liner, and customized packing is available upon request.

Packaging

Storage: Separately stored in a dry, ventilated warehouse equipped with fire-fighting facilities according to different grades and lot numbers.
Safety Precautions:
1. Keep away from fire and heat sources for storing and transportation.
2. Can not be transported or stored together with chemicals of oil, acid, alkali, etc.
3. We need to take proper measures to avoid damage to the packing materials and injury.