Hot Melt Adhesive For Book Spine Book glue is mainly divided into back glue and side glue, the back glue is mainly milky white, and the side glue is mainly white transparent or light yellow transparent. Hot Melt Adhesive For Book Spine,Books Binding Hot Melt Glue,Books Binding Spine Glue,Books Binding Spine Adhesive Shenzhen Tongde New Materials Technology Co., Ltd. , https://www.tdhotmeltglue.com
Company book glue properties.
In order to ensure the binding speed of books, different types of hot melt adhesives should be selected according to different machine speeds. Hot melt adhesives are divided into three types according to the binding speed: low speed binding hot melt adhesives (about 3600 copies/hour), medium speed binding hot melt adhesives (about 8000 copies/hour) and high speed binding hot melt adhesives (about 10000 copies/hour). The opening time and curing time of hot melt adhesive are closely related to the speed of binding. The opening time refers to the time between the hot melt adhesive and the other adhesive after the hot melt adhesive is applied to one adhesive. The opening time indicates that the two bonded objects must be bonded within the specified time, so as to ensure the bond strength. The opening time of the low-speed machine is 15 to 20 seconds, the medium-speed machine is 5 to 10 seconds, and the high-speed machine is 2 to 7 seconds. The curing time of hot melt adhesive refers to that after the cover and book block are bonded within the specified time, they can be turned and pressurized after a certain period of cooling, which is called the curing time. If the hot melt glue has not been cured, shaped and turned or cut, the back of the book will be deformed, and the hot melt glue will stick to the blade during cutting, affecting the quality of the product. When used, it should be reasonably selected according to the length of the conveyor belt, transmission speed, seasonal changes, etc. The curing time of hot melt adhesive is generally 3 to 5 minutes. 2) According to paper classification can be divided into coated paper and general paper with hot melt adhesive. The use of different types of paper, to choose the corresponding hot melt adhesive, because the paper surface finish, permeability, thermal conductivity is different. 3) According to the use of binding is classified into side glue and back glue. The hot melt adhesive used as side adhesive has good fluidity, low viscosity, long opening time and curing time, and high bonding strength. Book side glue requirements to achieve thin and uniform, bond firmly, in order to ensure the quality of the book and cutting requirements. You can't use two kinds of glue wrong. 4) According to the color of the glue classification In addition, if it is the same grade of product, yellow glue is better than white glue (but the manual generally requires the glue to be white). 302 series glue can meet the viscosity, hardness and color.
Driver Unit - Titanium Speaker Tweeter
**Model No.:** SD-5142
**Connection Mode:** Double Wire
**Current:** None
**Contact Point:** Without Contact Point
**Energy Exchanging Mechanism:** Electrical
**Throat Diameter:** 1.0 Inch (25mm)
**Mounting Type:** Bolt-on
**Nominal Impedance:** 8 Ohm
**Power Capacity:** 60 Watts RMS (Pink Noise Signal, -12 dB/OCT)
**Voice Coil Material:** Copper Clad Aluminum Round Wire
**Trademark:** OEM
**Transport Package:** Strengthened Carton Packaging + Color Box Packing
**Specification:** CE
**Origin:** Ningbo
**HS Code:** 851829000
---
**Product Description:**
The SD-5142 is a high-quality titanium diaphragm horn tweeter designed for superior sound clarity and performance. It features a robust construction with a titanium dome that ensures excellent high-frequency response and durability. The driver is ideal for use in professional audio systems, home theaters, and public address applications.
**Key Specifications:**
- **Throat Diameter:** 1 in (25mm)
- **Mounting Type:** Screw on 1 3/8" or Bolt-on
- **Nominal Impedance:** 8 Ohm
- **Power Capacity:** 60W RMS (Pink Noise, -12 dB/OCT)
- **Sensitivity:** 109 dB (1W/1M)
- **Frequency Range:** 1.2 kHz – 20 kHz
- **Diaphragm Material:** Titanium
- **Voice Coil Diameter:** 2.03 in (51.6 mm)
- **Voice Coil Material:** Round Aluminum Wire
- **Flux Density:** 1.75 T
- **Magnet:** Strontium Ferrite
- **Outer Diameter:** φ134 mm
**Packaging & Shipping:**
Each unit is carefully packaged in a strengthened carton box with an inner color box to ensure safe delivery. This packaging method protects the speaker during transit and maintains its quality upon arrival.
**Why Choose Us?**
- High-quality control throughout the production process
- Fast and reliable delivery
- Competitive pricing options
- Acceptable for small orders
- Custom OEM orders available
This speaker is perfect for audiophiles and professionals who demand top-tier sound performance. Whether you're setting up a studio or upgrading your home audio system, the SD-5142 delivers exceptional clarity and power.
With its durable design and advanced engineering, this driver unit is built to last and perform under various conditions. It's a great choice for those looking for a reliable and high-performance tweeter solution.