Tag smh machinery

Thin Paper Slitting Challenges? How SMH L-Type Unwind Stands Improve Bible Paper and Silicone Release Paper Processing

Thin Paper Processing Requires Higher Equipment Stability

Thin paper materials such as Bible paper, silicone release paper, and lightweight specialty paper are widely used in printing, packaging, food packaging, and industrial applications. However, these materials are extremely sensitive during slitting and rewinding.

Problems such as paper wrinkles, unstable tension, edge damage, and web breakage often occur when traditional slitting systems process ultra-thin paper.

To improve production stability for thin paper converting, SMH developed the L-Type High-Low Unwind Stand solution.

Optimized Web Feeding for Thin Paper Materials

The SMH L-Type unwind structure is designed to improve paper feeding stability during high-speed operation. By optimizing the paper web path and reducing unnecessary tension fluctuations, the system helps maintain smooth paper running throughout the slitting process.

Compared with traditional unwind structures, the L-Type design improves:

  • Web tension stability
  • Feeding smoothness
  • Paper roll alignment
  • Thin paper running control

This is especially important for lightweight papers that are highly sensitive to tension variation.

Stable Slitting for Sensitive Paper Grades

Bible paper and silicone-coated release paper require extremely clean cutting quality. Even small vibration or tension instability can affect final roll quality.

SMH slitting systems integrate:

  • Automatic tension control
  • Servo synchronization systems
  • High-precision knife positioning
  • Stable rewinding structures

These technologies help reduce edge damage, paper wrinkles, and roll deformation during production.

Supporting Multiple Specialty Paper Applications

In addition to Bible paper and silicone release paper, SMH slitting machines are also widely used for:

  • Lightweight coated paper
  • Food packaging paper
  • Medical packaging paper
  • Thermal paper
  • Label base paper

As demand for specialty paper continues growing, stable thin paper processing equipment is becoming increasingly important for paper converting factories.

SMH continues developing precision slitting solutions that help customers improve efficiency, reduce waste, and maintain stable production quality for sensitive paper materials.

Thin Paper Processing Requires Higher Equipment Stability

Thin paper materials such as Bible paper, silicone release paper, and lightweight specialty paper are widely used in printing, packaging, food packaging, and industrial applications. However, these materials are extremely sensitive during slitting and rewinding.

Problems such as paper wrinkles, unstable tension, edge damage, and web breakage often occur when traditional slitting systems process ultra-thin paper.

To improve production stability for thin paper converting, SMH developed the L-Type High-Low Unwind Stand solution.

Optimized Web Feeding for Thin Paper Materials

The SMH L-Type unwind structure is designed to improve paper feeding stability during high-speed operation. By optimizing the paper web path and reducing unnecessary tension fluctuations, the system helps maintain smooth paper running throughout the slitting process.

Compared with traditional unwind structures, the L-Type design improves:

  • Web tension stability
  • Feeding smoothness
  • Paper roll alignment
  • Thin paper running control

This is especially important for lightweight papers that are highly sensitive to tension variation.

Stable Slitting for Sensitive Paper Grades

Bible paper and silicone-coated release paper require extremely clean cutting quality. Even small vibration or tension instability can affect final roll quality.

SMH slitting systems integrate:

  • Automatic tension control
  • Servo synchronization systems
  • High-precision knife positioning
  • Stable rewinding structures

These technologies help reduce edge damage, paper wrinkles, and roll deformation during production.

Supporting Multiple Specialty Paper Applications

In addition to Bible paper and silicone release paper, SMH slitting machines are also widely used for:

  • Lightweight coated paper
  • Food packaging paper
  • Medical packaging paper
  • Thermal paper
  • Label base paper

As demand for specialty paper continues growing, stable thin paper processing equipment is becoming increasingly important for paper converting factories.

SMH continues developing precision slitting solutions that help customers improve efficiency, reduce waste, and maintain stable production quality for sensitive paper materials.

Why More Global Paper Mills Are Choosing SMH

Production Efficiency Is Becoming the Core Competitiveness of Paper Mills

In today’s paper converting industry, rising labor costs, increasing market competition, and higher delivery requirements are forcing paper manufacturers to improve production efficiency. For many factories, equipment stability and automation level directly affect production cost and profitability.

This is one of the main reasons why more paper mills worldwide are upgrading to automatic paper sheeting and packaging systems from SMH.

Reducing Labor Costs Through Automation

Traditional paper converting production often relies heavily on manual operation. Frequent material handling, packaging, pallet replacement, and paper inspection increase labor costs and production risks.

SMH automatic production lines integrate paper sheeting, counting, packaging, stacking, and conveying into one continuous process. Automatic pallet changing systems and robotic stacking devices help reduce manual operation while improving production consistency.

For large-scale paper mills, automation not only reduces labor dependency but also improves production stability during long-term operation.

Stable Production Means Lower Operating Costs

High-speed equipment must maintain stable operation over long production cycles. Unstable cutting precision, paper dust, and machine vibration can increase waste and maintenance costs.

SMH focuses on improving:

  • Cutting precision
  • Servo synchronization accuracy
  • Tension control stability
  • Automatic fault detection
  • Long-term running reliability

Stable production helps factories reduce paper waste, minimize downtime, and improve final product quality.

Complete Production Line Solutions

SMH provides complete paper converting solutions including:

  • Paper sheeters
  • A4 copy paper production lines
  • Ream wrapping systems
  • Carton packing systems
  • Automatic conveying solutions

By integrating multiple production processes into one automated workflow, customers can significantly improve overall factory efficiency.

Supporting Long-Term Factory Growth

Today, SMH equipment serves customers across Asia, Europe, Africa, and South America. As paper manufacturers continue expanding production capacity, automation and intelligent production systems will remain key drivers of industry development.

SMH continues providing efficient and stable equipment solutions to help customers improve productivity and reduce operating costs in competitive global markets.

Inside SMH’s 140,000㎡ Manufacturing Base: How High-Precision Paper Sheeters Are Built

Modern Manufacturing Behind Precision Paper Converting Equipment

As the global paper converting industry continues moving toward automation and intelligent manufacturing, equipment precision and production stability have become key factors for paper mills and packaging factories. Behind every stable paper sheeter and slitting machine is a complete manufacturing system designed for accuracy, efficiency, and long-term operation.

SMH operates a 140,000-square-meter manufacturing base dedicated to the production of paper sheeters, slitting machines, copy paper production lines, and automatic packaging systems. The facility integrates machining, welding, assembly, electrical integration, and machine testing into one complete manufacturing workflow.

smh manufacture base

From Raw Materials to Complete Machine Assembly

Inside the SMH factory, large CNC machining centers process key machine components with strict dimensional control. Machine frames, rollers, knife holders, and transmission systems are manufactured according to high-precision standards to ensure stable operation during high-speed production.

After machining, components enter the assembly workshop where engineers install PLC control systems, servo motors, automatic tension control systems, and synchronization modules. Every machine is assembled according to standardized production procedures to maintain consistent quality.

Strict Testing Before Delivery

Before shipment, each SMH machine undergoes complete testing under simulated production conditions. Engineers test cutting accuracy, tension stability, running speed, and automatic control performance.

Machines are adjusted according to different paper grades including copy paper, kraft paper, coated paper, cardboard, and thin paper materials. This helps customers reduce installation time and improve production efficiency after delivery.

Supporting Global Paper Manufacturers

Today, SMH equipment has been exported to more than 80 countries and regions. From Asia to Europe and South America, SMH production lines continue supporting paper mills, printing factories, and packaging companies with reliable automation solutions.

As global demand for efficient paper converting equipment grows, SMH continues investing in manufacturing technology, engineering development, and intelligent automation systems to provide stable and efficient solutions for customers worldwide.

The Complete Guide to Paper: From Raw Materials to Applications

Have you ever wondered how the paper you use every day is made? What’s the difference between various types of paper? This article will take you through the ins and outs of paper.

1. What Paper Is Made Of: Fibers and Additives Working Together

Main raw materials (plant fibers):

  • Wood, reeds, bamboo
  • Sugarcane bagasse, rice straw, wheat straw
  • Tree bark, cotton, hemp, etc.

Additives:

  • Fillers (e.g., clay, talc): fill gaps between fibers
  • Sizing agents: improve strength and smoothness
  • Dyes: for tinting or coloring – even white paper needs treatment

2. Specialty Papers: Types and Structure of Gold/Silver Cardboard

Gold/Silver Cardboard

TypeComposition
Aluminum foil basedAluminum + backing paper + varnish + print
PET basedFilm + backing paper + varnish + print
HolographicFilm + aluminum + embossing + backing paper + varnish + print

Note: Gold card is made by dyeing silver card (coated with red or yellow pigment), so its adhesion is generally weaker than that of silver card.

3. Paper Quality Evaluation Criteria

Visual quality

  • Uniformity: even distribution of fibers and thickness
  • Cleanliness: surface free from dirt and spots
  • Flatness: smooth and even

Physical properties

  • Squareness, caliper, density
  • Opacity, dirt count
  • Tensile strength, folding endurance, tear resistance

4. Paper Sizes Explained

Packaging formats

  • Sheet-fed: pre-cut by the mill, good flatness
  • Roll: wound on a core
Roll/Sheet-fed

Common sizes

TypeDimensions (mm)Inches
Large format889 × 119435″ × 47″
Standard format787 × 109231″ × 43″
Special formatAny size other than abovee.g., 25″ × 38″

5. Thickness vs. Grammage Reference Tables

Note: 1 “si” (Chinese unit) = 0.01 mm. Values vary by manufacturer and process; for reference only.

Coated paper (art paper)

GrammageThickness (si)
80 gsm5–6
105 gsm7–8
128 gsm10–11
157 gsm12–13
200 gsm16–17
230 gsm19
250 gsm22

Coated board

GrammageThickness (si)
230 gsm22–26
250 gsm26–27
300 gsm30–31
350 gsm35–37

Matte coated paper is about 2 si thicker than gloss coated paper of the same weight.

White card (solid bleached board)

GrammageThickness (si)
230 gsm29–30
250 gsm35
300 gsm40
350 gsm47–48
400 gsm52

White-backed white board / gray board

GrammageThickness (si)
250 gsm white back28
450 gsm white back57
250 gsm gray back28
300 gsm gray back36
350 gsm gray back42
400 gsm gray back49
450 gsm gray back57

Woodfree offset paper

GrammageThickness (si)
70 gsm8
80 gsm9
100 gsm11
120 gsm13
140 gsm16

Kraft paper

GrammageThickness (si)Notes
80 gsm11
120 gsm14
150 gsm16–1818 typical, 16 special
200 gsm22
300 gsm44

6. Practical Conversions and Selection Tips

How to choose:

  1. Brochures: 157–250 gsm coated paper
  2. Business cards: 300–350 gsm coated board or white card – specialty paper for a premium feel
  3. Book interiors: 70–120 gsm woodfree offset paper
  4. Packaging boxes: 250–400 gsm gray board or white card
  5. Envelopes/file folders: 80–150 gsm kraft paper

Thickness reference (everyday items):

  • Standard A4 printer paper: about 8–9 si
  • Typical business card: 30–35 si
  • Hardcover book cover: 40–50 si
  • High-end gift box: over 50 si

With this guide, you now have a solid understanding of paper raw materials, types, specifications, and quality standards. Whether for daily use or professional selection, this knowledge will help you make better decisions.