Clay has become a companion of human life for a very long time. The first glue, according to archaeologists, appeared 9.5 thousand years BC. It was made from various components of animal origin. Bones and tendons, fish scales and natural resins were the main components of the adhesive mass. Clerical glue has become the most common, as it is used by the population from small to large.
Glue making
Our ancestors used a brew of natural materials and animal waste until the 20th century.
When science began to develop rapidly, people expanded their knowledge about the quality and properties of materials and substances, and artificial components began to appear to create glue. The first who received a patent for the invented glue was the chemist Leo Bakeland. This happened in 1901. And in 1909, according to his patents, phenol-formaldehyde adhesives with electrical conductivity began to be mass-produced. Clerical glue appeared in the late thirties - early 40s of the last century.
Nowadays, high-tech equipment is used to produce glue. The process is becoming more automated. In a modern factory, they can carry out the entire process, from the production of the bottle to the label sticker on it.
Modern market
Every year, the chemical industry produces more than 100 million packages of stationery glue.
Sales turnover at the end of the year is estimated at no less than $ 10 million. Manufacturers say that the demand for clerical glue is not growing, but is at a stable level. The form in which the product is being promoted is changing. New types of pencils, stickers and ribbons with high adhesive characteristics are appearing. The highest quality products are manufactured by such countries: South Korea, Russia, Malaysia and Germany.
Glue purpose
The main goal of any adhesive is to join two surfaces. All of them differ in their composition and purpose. They have a different smell, color, they are drying and non-drying. Clerical glue is used to glue paper of various density and cardboard. It can also be used for domestic purposes.
Clerical glue characteristic:
- Drying out.
- Frost resistant.
- Transparent or white.
- May be liquid and solid.
The manufacturer must receive a certificate of quality for clerical glue. The composition is tested for toxicity and environmental compliance.
Types of stationery glue
Glue of a liquid type happens: silicate and PVA glue office.
The characteristic of silicate glue allows it to be used also in everyday life. The second name is liquid glass. It is used in the national economy. It is not convenient for working with paper, it spreads very much. In recent decades, it is used less often.
PVA clerical glue glues paper, cardboard, photo paper without difficulty. Demand for it is still there, it is more viscous, which allows its spreading to be controlled during application.
Composition of clerical glue
Silicate clerical glue, the composition of which determined its name, is now used more in construction. Its main components: silicate, polysilicates of lithium, sodium and potassium. It happens only in liquid form.
Glue office PVA has the decoding: polyvinyl acetate. It is an aqueous solution of this substance with the addition of plasticizer and modifying additives. In addition, there is a solid clerical glue. Its composition may differ in the basic substance. It can be polyvinyl acetate (PVA) or polyvinylpyrrolidone (PVP). PVA glue can be of several brands that determine its strength:
1. universal;
2. super or extra.
For office use, the first brand is required. Super or extra can be used in furniture and construction.
Packaging forms
Clerical glue is sold in various forms of packaging. Liquid glue is packaged in bottles of different sizes. The main difference is the shape of the tube and cap.
Super - cap is a narrow, elongated, unscrewing cap. The glue is applied to the surface using this cap.
Cap - a brush is used more often in bottles with silicate glue.
It is convenient to use for glue of liquid consistency.
Cap - the duck resembles a super – cap, only larger, has a wider hole.
Glue - clerical pencil is now the most common option. It is the most convenient to use. It is applied easily, does not spread, is economical, and has excellent adhesive properties.
Spray glue is a new type of stationery glue, which also helps to glue wood, polystyrene and metal.
Use of clerical glue in everyday life
People have found many more ways to use clerical glue. Technical characteristics allow it to be widely used in everyday life. We will consider further how silicate glue or PVA glue can still be used.
Silicate glue or water glass is a substance that is used in construction. The main purpose of use is waterproofing.
Options for using silicate glue.
- Add to the paint for the facades. Gives durability.
- Processing walls and floors in the bathroom for sealing.
- It is used for waterproofing foundations.
- Add to cements and concretes, getting new grades of solutions.
- Used for the manufacture of special putty, which is coated with water pipes.
- Impregnated fabrics will become durable protective materials.
- Gardeners work on pruning trees and shrubs to protect them from harmful bacteria.
- They cover surfaces that must be protected from ultraviolet radiation.
- Used to wash dirty dishes and pans.
Recipe for removing carbon from pans using silicate glue.
Our grandmothers and great-grandmothers used this method. You need to take a metal basin or a large pan. Pour one tube of silicate glue into it. Put all the pans and lids there. Put this container on the fire and boil. Miraculously, all the soot comes off the dishes. After all the dishes, rinse thoroughly under running water. There is a similar recipe with the addition of laundry soap and soda ash.
PVA glue is also well known to builders and furniture makers.
Options for using PVA glue.
- Used when assembling furniture.
- It fastens the carpet to the floor.
- It is reliable when fastening linoleum.
- Used for gluing tiles.
- It will be useful when gluing wallpaper.
- Add to the primer and putty, in water-based paint.
PVA glue has gained popularity due to its non-toxicity, fire safety, high adhesive ability and ease of use. They can glue paper, leather, glass, fabric, plastic, metal.