PLM-814 Low-Shrinkage Additive

PLM-814 Low-Shrinkage Additive

Product Overview: This product is a specialized low-shrinkage additive designed specifically for compression molding (SMC/BMC) applications. It is formulated to address the issue of curing shrinkage in unsaturated polyester resins, significantly reducing shrinkage rates during the molding process. It effectively resolves common industry pain points such as product warping, surface sink marks, and significant dimensional deviations.


Colorable

Flat Surface

High Gloss

Low Viscosity

Low Profile

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The product exhibits excellent compatibility with various compression molding resins, glass fibers, and fillers, without compromising the system's curing speed or reactivity. Post-molding, the resulting parts feature flat, smooth surfaces—free of ripples or pinholes—along with high dimensional accuracy and excellent consistency. Furthermore, it enhances surface gloss and paint adhesion. This additive is widely applicable to composite products requiring high aesthetic standards and precision, including automotive components, electrical enclosures, sanitary ware, and precision structural parts.

Core Performance Advantages

High Efficiency & Low Shrinkage

Significantly reduces resin curing shrinkage, effectively preventing deformation, warping, and cracking at the source.

Zero Surface Defects

Eliminates sink marks, ripples, and depressions, resulting in product surfaces that are flat, smooth, and highly glossy.

High Dimensional Precision

Ensures stable molded dimensions with tight tolerances, delivering excellent consistency in mass production.

Strong System Compatibility

Integrates seamlessly with SMC, BMC, and various molding resins without compromising mechanical strength or curing efficiency.

Application

汽车零部件

Automotive Components


电气绝缘件

Electrical Enclosures


卫浴洁具

Sanitary Ware


Precision Structural Parts


FAQ

What is a Low-Profile Additive (LPA)?
It is a class of thermoplastic polymer modifiers that, when compounded with Unsaturated Polyester Resin (UPR), counteract the volumetric shrinkage that occurs during resin curing. By resolving issues such as warping, cracking, surface waviness, and dimensional deviation in finished products, it serves as a core additive for ensuring the surface quality and dimensional stability of SMC and BMC materials.
What is the typical addition ratio for Low-Profile Additives?
Standard BMC / General-purpose SMC: 15%–25%
Low-waviness / Class A surface products: 25%–35%
High-precision dimensional parts / Ultra-thin parts: 35%–40%

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Whatsapp: +86-18068598369

ADD: No. 366 Heping Middle Road, Tianning District, Changzhou City, Jiangsu Province, China

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