BSF Materials™Shenzhen Peidisen international Trade Co., Ltd.

WET PROCESS PE

Wet Process PE Separator Film

Ultra-thin base separator film with high tensile strength, high porosity and excellent consistency.

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Ultra-thin wet-process polyethylene separator film guided over precision inspection rollers
Thickness3-20 μmPublished wet-process base-film range
Base materialPolyethylene (PE)
Pore structureEven porosity; stable air permeability

Key advantages.

High-performance polyethylene base separator film developed for material consistency and demanding lithium-ion cell manufacturing.

Ultra-thin structure
High tensile strength
High porosity
Excellent consistency

SOURCE-DOCUMENTED PROFILE

Process route, pore morphology and model-level data.

The supplied literature describes a 3–20 μm wet-method separator range and documents simultaneous, sequential and high-strength production routes. Model values below retain the original tolerances and test conditions.

Technical content reproduced from the supplied wet-method base-separator literature, pages 3–6.
01

Thickness uniformity and low thermal shrinkage are stated product attributes.

02

Tensile strength, puncture resistance, porosity and air permeability are reported by model.

03

The ultra-high-strength reference morphology is described as even in porosity with stable permeability.

PRODUCTION ROUTES

Three documented process sequences.

Each route follows the original process order. Stage names are translated without adding unlisted operations.

01

Simultaneous biaxial stretching

Both stretching directions are integrated in the documented biaxial route.

  1. 01Batching extrusion
  2. 02Casting
  3. 03Biaxial stretching
  4. 04Extraction and drying
  5. 05TD stretching
  6. 06Thermoforming
  7. 07Winding
02

Sequential biaxial stretching

MD stretching precedes the two printed TD stages in the sequential route.

  1. 01Batching extrusion
  2. 02Casting
  3. 03MD stretching
  4. 04TD stretching 1
  5. 05Extraction and drying
  6. 06TD stretching 2
  7. 07Thermoforming
  8. 08Winding
03

High-strength process

The documented high-strength route adds combined stretching, traction and online coating stages.

  1. 01Batching extrusion
  2. 02Casting
  3. 03Combined stretching
  4. 04Traction
  5. 05Extraction and drying
  6. 06TD stretching 2
  7. 07Online coating
  8. 08TD stretching 3
  9. 09Winding

MICROSCOPY / SURFACE DETAIL

Published separator surface morphology

The reference micrograph is shown beside three process-comparator samples. Captions state only the observations printed in the supplied literature.

SEM image of the published ultra-high-strength separator showing a uniform porous networkReference
Ultra-high-strength referenceEven porosity and stable permeability.
SEM comparator sample showing coarse aligned fibre bundles
Comparator sample 01Coarser fibre bundles and fibre hugging are visible.
SEM comparator sample showing locally closed pores on the separator surface
Comparator sample 02Closed-pore formation is visible on the separator surface.
SEM comparator sample showing damaged pores and fractured fibre bundles
Comparator sample 03Damaged pore structure and fractured fibre bundles are visible.

PHYSICAL PROPERTIES

Published wet-process base-film matrix

Eight model codes are compared under the test conditions printed in the supplied product literature. Directional values remain separated as TD and MD.

Compare all 8 published configurations

Test itemDir.KS055KS071KS093KS098KS122KS162KS164KS165
Thicknessμm—5±0.57±19±19±112±116±1.516±1.516±1.5
Widthmm—————————
Porosity%—32±436±538±550±540±543±540±545±4
Heat shrinkage105°C / 1 h · %TD≤2.0≤3.0≤3.0≤9.0≤1.5≤1.5≤1.5≤3
Heat shrinkage105°C / 1 h · %MD≤3.0≤4.0≤5.0≤9.0≤3≤3≤3≤6
Surface densityg/m²—3.2±0.44.2±0.85.3±0.84.3±1.06.9±1.08.7±1.29±18.5±1.5
Air permeabilitysec/100 cc—130±40160±50160±5070±30170±40200±40230±50180±30
Tensile strengthMPaTD≥265≥160≥120≥200≥180≥160≥150≥230
Tensile strengthMPaMD≥265≥180≥150≥200≥180≥180≥170≥230
Elongation at break%TD≥80≥60≥50≥30≥100≥100≥100≥60
Elongation at break%MD≥60≥60≥50≥30≥60≥60≥60≥60
Puncture strengthgf—≥500≥300≥300≥500≥600≥600≥600≥600

A dash in the width row reproduces the source table; no width value is inferred.

Values are literature references, not a lot-specific certificate of analysis.

QUALIFICATION CONTEXT

From literature value to qualified grade.

Published matrices support initial comparison. Final specifications remain tied to the selected grade, agreed test method and lot-specific quality documentation.

Application areas

  • Electric vehicles
  • Energy storage
  • Consumer electronics

Get pricing for Wet Process PE Separator Film.

Send the target thickness, width, coating requirements and volume for a project quotation, typically expressed in USD per square metre.

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