Where our films work

Overview

Aerospace composites manufacturing puts three demands on film materials: the temperature ceiling, slitting precision, and consistency from one process step to the next. Sentrui supplies aerospace customers with a complete film portfolio — from prepreg release and vacuum bag sealing to high-temperature masking — with slitting tolerances as tight as ±0.005".

Typical Applications

• Interleaving and unwinding of prepreg plies (PE/PP prepreg release film, embossed and mesh films)

• Vacuum bag sealing and masking through autoclave curing cycles (PA vacuum bagging film, PET/PI high-temperature tape)

• AFP / ATL automated fibre and tape placement

• High-temperature masking protection for electronic parts, PCB transformers and capacitor coils

Our Solution

• Complete kit: prepreg release film, embossed and mesh films, PA vacuum bagging film and PET/PI high-temperature tape from a single supplier, cutting multi-vendor coordination effort

• High-precision slitting: tolerances as tight as ±0.005", matched to narrow-tow automated placement and precision workstations

• Low resin transfer: prepreg release film holds low resin transfer and consistent peel strength across the full width, while high elongation keeps the application wrinkle-free

• High-temperature reliability: PI tape withstands 260 °C continuous and 300 °C peak, and its silicone system removes without residue after curing

Key Parameters

• Slitting tolerance: ±0.005"

• Prepreg release film: low resin transfer, consistent peel across width, high elongation, wrinkle-free

• PA vacuum bagging film: 204 °C temperature grade for large moulds and curing

• High-temperature tape: PET 220 °C; PI 260 °C continuous / 300 °C peak

• Electrical: high-temperature tape offers excellent dielectric strength

FAQ

• How tight can the slitting tolerance be? Width tolerances can be held to within ±0.005", meeting the assembly requirements of narrow-tow automated placement and precision workstations.

• How is resin transfer controlled on the release film? A low-resin-transfer formulation holds consistent peel strength across the full width and high elongation keeps the application wrinkle-free, reducing cleaning and contamination risk between process steps.

• What mould sizes can the bagging film handle? For large moulds and long cure cycles we supply high-elongation, heat-resistant PA vacuum bagging film together with matched auxiliary materials.

• Does high-temperature masking leave residue? PET / PI high-temperature tapes use a high-performance silicone system that removes without residue after curing, removing a second cleaning step.

Related products: Prepreg Release Film | PA Vacuum Bagging Film | High-Temperature Tapes (PET / PI)

Overview

Wind turbine blades are large and cure over long cycles, which places heavy demands on the elongation, temperature grade and sealing reliability of the vacuum bagging film. Once blades and heavy equipment leave the plant, industrial shrink and hood films are needed to keep unit loads stable and protected. We supply a matched material package for both stages.

Typical Applications

• Vacuum bag sealing and long cure cycles on large blade moulds

• Outbound packaging and pallet stabilisation for blades and heavy equipment

• Auxiliary masking of vacuum and resin feed lines

Our Solution

• Large-format fit: high-elongation, heat-resistant PA vacuum bagging film and matched auxiliary materials for large moulds and long cure cycles

• Reliable sealing: high-elongation film conforms to complex mould geometry, reducing bridging and leak paths, and can be reinforced locally with high-temperature masking tape

• Protective packaging: heavy-duty shrink film with shrinkage up to 80% delivers tight, skin-tight wrapping, while cold stretch hood film with elastic recovery above 90% forms a six-sided water and dust seal

• No-heat option: cold stretch hood film wraps a full pallet without heat, lowering energy loss and fire risk

Key Parameters

• PA vacuum bagging film: 204 °C temperature grade

• Bagging film: high elongation, heat resistant, suited to large moulds and long cure cycles

• Heavy-duty shrink film: shrinkage up to 80% (MD / TD)

• Cold stretch hood film: elastic recovery > 90%

• Protection level: six-sided water and dust seal (hood film)

FAQ

• Large moulds tend to leak — what helps? Use high-elongation bagging film that conforms to complex geometry to reduce bridging and leak paths, and reinforce critical areas with high-temperature tape.

• Can the film take our cure temperature? We supply PA vacuum bagging film in a 204 °C temperature grade, suited to long cure cycles.

• Which packaging for outbound blades? Choose heavy-duty shrink film (up to 80% shrinkage) when you need a skin-tight wrap with high shrinkage; choose cold stretch hood film (elastic recovery > 90%, six-sided seal) when you want no heat, lower energy use and reduced fire risk.

• Can sizes be customised to our moulds or transport units? Yes — film width and packaging specifications are customised to mould and transport-unit dimensions.

Related products: PA Vacuum Bagging Film | Heavy-Duty Industrial Shrink Film | Stretch Hood Film | High-Temperature Tapes (PET / PI)

Overview

The quality of silage depends on fermentation conditions, and fermentation conditions depend on how well the wrap and cover seal. Sentrui silage wrap and panda film are produced by multi-layer co-extrusion, providing sealing and protection for bale wrapping, silage pit covering and controlled-light indoor cultivation.

Typical Applications

• Hay and silage bale wrapping

• Silage pit and silage clamp covering

• Controlled-light indoor cultivation and tunnel covering

• Long-term outdoor protection of crops and forage

Our Solution

• Multi-layer co-extrusion oxygen barrier: an ultra-high oxygen barrier suppresses aerobic spoilage and improves fermentation quality

• UV resistance: fortified with high-grade UV stabilizers for 12–24 months of extreme-weather protection

• Puncture and tear resistance: high puncture and tear strength prevent bale damage during handling and stacking

• Two-sided black and white function: the white face reflects > 88% of light for cooling, while the black face is fully opaque for light control and weed suppression

Key Parameters

• Model: STR-04.011 / STR-04.012

• Structure: multi-layer co-extrusion

• Oxygen barrier: ultra-high oxygen barrier

• UV protection: 12–24 months

• White-side reflectivity: > 88%

• Black side: fully opaque

• Mechanical strength: high puncture and tear resistance

FAQ

• How long can wrapped bales be stored? High-grade UV stabilizers provide 12–24 months of extreme-weather protection; actual storage life also depends on wrap layers, stacking method and site conditions.

• How is fermentation quality improved? The multi-layer co-extruded structure provides an ultra-high oxygen barrier, limiting oxygen ingress and creating stable anaerobic conditions for lactic fermentation.

• What if bales are easily damaged in handling? A high puncture and tear resistant formulation reduces the risk of film damage during handling and stacking.

• How are the two faces of the panda film used? The white face reflects > 88% of light for cooling, while the fully opaque black face provides light control and weed suppression, commonly used for controlled-light indoor cultivation and tunnel covering.

• Are panda film and silage wrap the same product? Both belong to the agricultural film line: silage wrap is used for bale wrapping, while panda film (black and white) is used for silage pit covering, tunnel covering and controlled-light cultivation.

Related products: Panda Film & Silage Wrap Film | Heavy-Duty Industrial Shrink Film | Industrial Packaging Bags

Overview

PE high-transparency shrink film serves premium product display packaging, where the pack must both show the product clearly and open easily. Crystal-clear transparency keeps the contents visible, balanced biaxial shrinkage conforms tightly for a firm wrinkle-free pack, and an optional machine-perforated easy-tear line lets consumers open the pack cleanly without any tool.

Typical Applications

• Beverage multi-packs (bottled water, soft drinks, beer)

• Home and personal care bundling

• Industrial product packaging, roll packaging and similar

Common Operating Challenges

• High film haze dulls labels and makes the pack look cheaper than competing brands on shelf

• Multi-packs need a knife or heavy tearing to open, generating complaints about cut hands and ragged tear lines

• Perforations from some suppliers sit off-position and leave frayed edges when the film breaks

• Concern that switching to a high-clarity film will reduce shrink strength or line compatibility

Our Solution

• Crystal-clear transparency: haze as low as ≤ 4% and gloss ≥ 110 GU keep contents clearly visible

• Precision easy-tear perforation: a light pull opens the pack cleanly with no knife and no frayed edge; tear position and interval are customised to the pack size

• Balanced uniform shrinkage: controlled biaxial shrink conforms tightly to the product and keeps the pack firm and wrinkle-free from production line to customer

• Fully customisable: thickness, width, printing, anti-fog and perforation options, with OEM/ODM and rapid sampling

Key Parameters

• Structure: multi-layer co-extruded polyolefin film

• Haze: ≤ 4%

• Gloss (60°): ≥ 110 GU

• Shrink behaviour: balanced biaxial shrink, wrinkle-free fit

• Easy-tear line: optional mechanical perforation, position and interval customisable

• Customisation: thickness, width, printing, anti-fog, perforation

• Food contact: EU food-contact compliant options available on request

FAQ

• Will the easy-tear line break prematurely in transit? Tear position and interval are designed per pack size and bottle shape, and sample film is verified on the customer's own line before mass production.

• Does high transparency reduce shrink performance? Transparency and shrink come from the same multi-layer co-extruded structure — haze ≤ 4% and gloss ≥ 110 GU are achieved alongside balanced biaxial shrink.

• Can the tear direction and position be customised? Yes, tear position, interval and direction are all customised to the pack size; standard film without perforation is also available.

• Are samples available? Yes, rapid sampling is supported with multiple thickness options for line trials.

Related products: PE High-Transparency Shrink Film | Heavy-Duty Industrial Shrink Film | Stretch Hood Film

Overview

High-temperature masking stations demand three things from a tape: it must survive the process temperature, remove cleanly without adhesive residue, and meet the required dielectric performance. We supply both polyester (PET) and polyimide (PI) high-temperature tapes, selected in tiers against each station's actual peak temperature so that costly material is not over-specified.

Typical Applications

• Vacuum-bag masking and high-temperature composite curing cycles

• Electronics, PCB transformers, capacitor coils and lithium batteries

• Masking for high-temperature baking, powder coating and electroplating

• Splicing positions on release paper, release film and leather

• Surface masking and protection in other high-temperature environments

Selection Rule: PET or PI

• Standard masking stations up to 220 °C: choose PET high-temperature tape, at a better cost

• Extreme stations requiring 260 °C continuous / 300 °C peak, such as autoclave curing: choose PI high-temperature tape

Our Solution

• Tiered configuration: PET / PI matched to the station temperature list, avoiding over-specification

• Residue-free removal: a high-performance silicone system leaves no adhesive trace after high-temperature curing, removing a second cleaning step

• Excellent dielectric strength: meeting demanding aerospace and electronics standards

• Customisable: beyond standard widths and thicknesses to customer requirements

Key Parameters

• Temperature rating (PET): 220 °C

• Temperature rating (PI): 260 °C continuous / 300 °C peak

• Adhesive: high-performance silicone, residue-free removal after curing

• Electrical: excellent dielectric strength

• Customisation: custom widths and thicknesses beyond standard

FAQ

• How do I choose between PET and PI? Choose by your highest actual process temperature. PET covers stations up to 220 °C; where 260 °C continuous or 300 °C peak is required, PI is mandatory.

• Is removal genuinely residue-free? Both tapes use a high-performance silicone system designed for residue-free removal. Validate on your own curing cycle with a sample first.

• Can width and thickness be customised? Yes, beyond standard sizes to customer requirements.

• How good is the PI tape's insulation? It offers excellent dielectric strength, meeting demanding aerospace and electronics standards.

Related products: High-Temperature Tapes (PET / PI) | PA Vacuum Bagging Film | Prepreg Release Film

Overview

Unit loads face three problems across long-haul transport and repeated handling: goods shifting on the pallet, moisture and dust reaching the top face, and the energy and fire-safety cost of heat-shrink equipment. We offer two routes — heavy-duty shrink film and cold stretch hood film — split by whether heat is used.

Typical Applications

• Unit-load transport of petrochemical products and chemical raw materials

• Building materials and finished home appliances

• Large equipment protection and pallet stabilisation

• Pallet wrapping in automated logistics centres

• Beverage multi-packs

Choosing Between the Two

• Want no heat and lower energy use and fire risk: choose cold stretch hood film — elastic recovery above 90% forms a six-sided water and dust seal

• Need a skin-tight wrap with high shrinkage: choose heavy-duty shrink film — shrinkage up to 80% with a heavy-duty puncture-resistant formulation

Our Solution

• Cold stretch hood film: elastic recovery above 90% keeps loads stable through long-haul transport; six-sided water and dust sealing protects better than side-only stretch wrap; cold stretch technology reduces energy loss and fire risk

• Heavy-duty shrink film: shrinkage up to 80% delivers tight skin-tight wrapping; the heavy-duty industrial formulation protects equipment from abrasion in transit

• Customisable: hood dimensions and film width set to pallet size and stacking pattern

Key Parameters

• Shrinkage (heavy-duty shrink film): up to 80% (MD / TD)

• Elastic recovery (cold stretch hood film): > 90%

• Puncture resistance: industrial-grade heavy duty / high

• Protected faces: six-sided water and dust seal (hood film)

• Heat required: none for the hood film; heat shrink for the heavy-duty film

• Additional benefit: cold stretch lowers energy loss and fire risk

FAQ

• Without heat, how does the hood keep the load together? Through elastic recovery — the film recovers above 90% and keeps pulling the load tight after application, holding the pallet stable through long-haul transport.

• How is a stretch hood different from stretch wrap? Stretch wrap mainly covers the sides; a stretch hood forms a six-sided water and dust seal that also covers the top of the pallet.

• When should I choose heavy-duty shrink film instead of a hood? Choose heavy-duty shrink film for a skin-tight wrap around the product shape with high shrinkage (up to 80%), or for large equipment protection and pallet stabilisation. Choose a cold stretch hood when you want no heat, lower energy use and reduced fire risk.

• Can sizes be customised to our pallets? Yes — hood dimensions and film width are customised to pallet size and stacking pattern.

Related products: Heavy-Duty Industrial Shrink Film | Stretch Hood Film | Industrial Packaging Bags