Tiangang® HS-629
One-pack system · HS-629
high performance light stabilizer package specifically designed for thin PE/PP applications. It imparts high light stability to the films, as well as improved long-term thermal stability. It also features elevated resistance against chemicals, such as sulfur and chloride compared to traditional light stabilizers. Tiangang® HS-629 is particularly suitable for 2-4 season agricultural films
In one sentence: A powder light stabiliser with a 90 – 130 °C melting range, with dosage given separately for agricultural film, automotive compounds and thin-wall parts.
- Melting range: 90 ~ 130 °C (source: spec table on this page)
- Agricultural film dosage: 0.3 – 1.5% (source: recommended dosing table on this page)
- Automotive compound dosage: 0.3 – 1.0% (source: recommended dosing table on this page)
- Thin-wall and injection moulding dosage: 0.3 – 0.8% (source: recommended dosing table on this page)
What it is
Tiangang® HS-629 is a one-pack system. A one-pack pre-blends light stabilizer, antioxidant and UV absorber for a specific application, so the customer receives one product instead of several to weigh and mix. Product identifiers: melting point 90 ~ 130.;
Technical data
| Description | Tiangang® HS-629 is a high performance light stabilizer package specifically designed for thin PE/PP applications. It imparts high light stability to the films, as well as improved long-term thermal stability. It also features elevated resistance against chemicals, such as sulfur and chloride compared to traditional light stabilizers. Tiangang® HS-629 is particularly suitable for 2-4 season agricultural films. |
| Appearance | Molecular weight | Melting range, oC | |
| Tiangang® HS-629 | Brownish yellow powder | High | 90 - 130 |
| Weight loss | 2% | 5% | 10% | |
| Tiangang® HS-629 | Temperature (oC) | 301 | 340 | 352 |
| Tiangang® HS-629 | The use of proper protective equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling. Store the product in a cool, dry, well-ventilated area away from incompatible materials. |
| Disclaimer | The information supplied is presented in good faith and has been derived from sources believed to be reliable. Since conditions of use are beyond our control, all risks are assumed by the user. No representation is expressed or implied, and nothing herein shall be construed as permission or recommendation to practice a patented invention without license. |
Melting point 90 ~ 130 °C — the processing window needs to reach above it for uniform dispersion.
Where it is used, and at what loading
Each grade maps to one scenario: agricultural film means pesticide and sulfur resistance; automotive compounding means high-temperature processing plus long exterior life; thin-wall parts mean low volatility. Choosing the wrong scenario is choosing the wrong formulation.
| Agricultural film | 0.3 – 1.5% |
|---|---|
| Automotive compounds | 0.3 – 1.0% |
| Thin-wall and moulded parts | 0.3 – 0.8% |
Figures above are typical industry ranges, not guaranteed values. The actual loading depends on wall thickness, design life and the other additives in the system, and should be established by a loading ladder on the real formulation.
On the line
Weigh the pack against the total target loading and dry-blend with the resin; there is no need to dose the individual components. Where the formulation also contains acidic components (some flame retardants, acidic fillers, sulfur-bearing additives), separate the feed order or switch to a low-basicity grade to avoid protonating the HALS. For lines running many grades in small batches, a one-pack mainly removes the chance of a mixing error.
Choosing between similar grades
Three things decide the choice for HS-629: carrier-to-matrix match, active content, and application fit. A one-pack for thin PE/PP parts that pre-combines diffusion and retention components — suited to thin-wall, short-cycle production.
Frequently asked questions
Why buy a one-pack instead of blending in-house?
Blending in-house means solving three problems: ratio, dispersion and batch-to-batch consistency. A one-pack solves them at the factory, leaving the line with a single loading figure. For lines running many grades in small batches, what it removes is the chance of a mixing error.
Can the ratio inside the pack be adjusted?
Yes, given volume. Our blending line has a minimum order for custom ratios, because every blend is re-validated for dispersion and homogeneity.
Why are there several grades for one application?
Differences inside an application are larger than they look. Agricultural film in hot humid south China and in high-UV north China need different balances; bumper and instrument panel differ in wall thickness and surface requirement. Finer grade splits keep the tuning margin in the customer's hands.
The figures and guidance above follow Tiangang's published technical material and common industry practice. For a specific formulation, refer to the batch COA and the technical agreement between the parties.
Certifications
- National High-Tech Enterprise
- Vice Chairman Unit, China Plastics Processing Industry Association (CPPIA)
- Vice Chairman Unit, Agricultural Plastics Branch, China Agricultural Plastics Application Technology Society
- Member, Ageing Methods Subcommittee, National Technical Committee on Plastics (SAC/TC15/CS5)
- Member, Society of the Plastics Industry (SPI), USA
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- Tiangang-Tinaco BUCT scholarship award ceremony 2021-2022
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