The first week of July has already delivered a clear warning signal to the chemical fiber market: on July 7, the average sales-to-production ratio of polyester filament sample enterprises stood at only 42.9%, a dramatic 29-percentage-point drop from the previous trading day. This figure means that for every 100 tons of polyester filament produced, fewer than 43 tons were purchased by downstream buyers, with the remainder piling up as inventory. For filament manufacturers accustomed to balanced or even oversold production, this low ratio is a cold shower. Among the 23 sample enterprises, only two achieved a sales ratio of 100% or above, while the remaining 21 suffered severe sales shortfalls.
Deep Signals from Weak Sales
Breaking down the specific sales data, the ratios on July 7 were highly dispersed: the highest was 200% (just one company), and the lowest was 10%. The majority fell in the 20%–45% range, forming a typical "long-tail slump" pattern. This distribution suggests the problem is not isolated to a few firms with quality or channel issues, but reflects a systemic cooling of downstream demand. The direct cause of this plunge is weak buying sentiment among downstream users. Looking at the industrial chain, the main downstream segments for polyester filament are weaving mills and texturing plants. Their purchasing willingness depends heavily on gray fabric orders, final garment consumption, and their own raw material inventory levels. Early July is typically a transition period from the slack season to the peak season for textiles, but this year's order recovery appears slower than expected, keeping weaving mill operating rates low and limiting raw material procurement to just-in-time replenishment. More concerning is that some producers have begun offering discounts to stimulate sales. However, whether discounting can truly boost sales depends on downstream expectations of price floors. If the market broadly expects further price declines, discounts may reinforce wait-and-see behavior, creating a negative feedback loop where lower prices lead to even lower purchases.
Ripple Effects Across the Polyester Chain
The sharp decline in polyester filament sales directly accelerates inventory buildup at polyester plants. Based on current daily production estimates, if the sales ratio remains in the 40%–50% range, sample enterprises' inventory days could rise by 3–5 days within one to two weeks, approaching or breaching warning levels. Once inventory pressure reaches a tipping point, plants will be forced to either deepen production cuts or expand discount ranges, triggering a revaluation of the entire price system. Upstream, PTA and MEG, the direct raw materials for polyester filament, will see their price support weakened. Weak filament sales mean polyester producers' demand for raw materials also contracts simultaneously, putting greater selling pressure on the PTA spot market. Previously, PTA prices were supported by tight PX supply, but with demand-side collapse, they now face pressure from both cost and demand sides. Downstream, the speed of inventory digestion at gray fabric and finished fabric stages will become a key variable. If apparel brands' order placement does not improve by mid-to-late July, weaving mills may further cut operating rates, exacerbating the contraction in filament procurement. At that point, negative feedback would cascade from filament sales ratios to polyester operating rates, then to PTA demand, forming a complete destocking cycle.
Short-Term Price and Inventory Dynamics
The polyester filament market is currently at a critical point of multi-directional competition. The bullish logic rests on relatively high crude oil and PX prices, which provide rigid cost support, and on production cuts already implemented by some polyester plants, which could offset weak demand. The bearish logic is more straightforward: insufficient downstream orders, rising inventories, and persistently low sales ratios leave no room for price increases. Historically, July–August is typically a period of price consolidation and bottoming for polyester filament. The difference this year is that weaving mills are under tighter cash flow pressure, making them even less willing to stockpile than in previous years. This undermines the traditional "slack-season restocking" narrative. Therefore, polyester filament prices are likely to fluctuate within a narrow range in the near term, lacking the demand support for a significant rally while being held up by cost floors against a sharp decline.